A comprehensive list of many acronyms concerning the world of technology. This project was created to help those who study or work in technology better navigate the thousands of acronyms used every day.
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| Abbreviation | Full Form |
|---|---|
| AA | Anti-Aliasing |
| AAA | Authentication, Authorization, and Accounting |
| AaaS | Analytics as a Service |
| ACID | Atomicity, Consistency, Isolation, Durability |
| ACL | Access Control List |
| AD | Active Directory |
| ADB | Android Debug Bridge |
| ADSL | Asymmetric Digital Subscriber Line |
| AES | Advanced Encryption Standard |
| AGI | Artificial General Intelligence |
| AGP | Accelerated Graphics Port |
| AI | Artificial Intelligence |
| AIO | All-In-One |
| AIOps | Artificial Intelligence for IT Operations |
| AJAX | Asynchronous JavaScript and XML |
| ALU | Arithmetic Logic Unit |
| AM | Additive Manufacturing |
| AMI | Amazon Machine Image |
| ANN | Artificial Neural Network |
| ANSI | American National Standards Institute |
| AOP | Aspect-Oriented Programming |
| API | Application Programming Interface |
| APK | Android Package Kit |
| APM | Application Performance Management |
| APN | Access Point Name |
| APT | Advanced Persistent Threat |
| ARM | Advanced RISC Machine |
| ARP | Address Resolution Protocol |
| AS | Autonomous System |
| ASCII | American Standard Code for Information Interchange |
| ASIC | Application-Specific Integrated Circuit |
| ASLR | Address Space Layout Randomization |
| ASP | Active Server Pages |
| AST | Abstract Syntax Tree |
| ATA | Advanced Technology Attachment |
| ATM | Asynchronous Transfer Mode |
| AVC | Advanced Video Coding |
| AV | Antivirus |
| AWS | Amazon Web Services |
| AZ | Availability Zone |
| B2B | Business-to-Business |
| B2C | Business-to-Consumer |
| BaaS | Backend as a Service |
| BASIC | Beginner's All-purpose Symbolic Instruction Code |
| BBS | Bulletin Board System |
| BCD | Binary Coded Decimal |
| BCP | Business Continuity Planning |
| BER | Bit Error Rate |
| BGP | Border Gateway Protocol |
| BI | Business Intelligence |
| BIOS | Basic Input/Output System |
| BIPS | Billion Instructions Per Second |
| BLOB | Binary Large Object |
| BMP | Bitmap |
| BOM | Byte Order Mark |
| BPS | Bits Per Second |
| BRD | Business Requirements Document |
| BSOD | Blue Screen of Death |
| BSON | Binary JSON |
| BT | Bluetooth |
| BYOD | Bring Your Own Device |
| CAD | Computer-Aided Design |
| CAE | Computer-Aided Engineering |
| CAM | Computer-Aided Manufacturing |
| CAP | Consistency, Availability, Partition tolerance |
| CAPEX | Capital Expenditure |
| CAPTCHA | Completely Automated Public Turing test to tell Computers and Humans Apart |
| CAS | Central Authentication Service |
| CASE | Computer-Aided Software Engineering |
| CAT | Category (e.g., Cat5, Cat6 cables) |
| CBR | Constant Bit Rate |
| CBT | Computer-Based Training |
| CCD | Charge-Coupled Device |
| CCNA | Cisco Certified Network Associate |
| CCTV | Closed-Circuit Television |
| CD | Compact Disc |
| CDN | Content Delivery Network |
| CDP | Continuous Data Protection |
| CERT | Computer Emergency Response Team |
| CGI | Common Gateway Interface / Computer-Generated Imagery |
| CIA | Confidentiality, Integrity, and Availability (Triad) |
| CI/CD | Continuous Integration / Continuous Deployment |
| CIDR | Classless Inter-Domain Routing |
| CIO | Chief Information Officer |
| CISC | Complex Instruction Set Computer |
| CLI | Command Line Interface |
| CLR | Common Language Runtime |
| CMOS | Complementary Metal-Oxide-Semiconductor |
| CMS | Content Management System |
| CNAME | Canonical Name |
| CNN | Convolutional Neural Network |
| COBOL | Common Business-Oriented Language |
| CORS | Cross-Origin Resource Sharing |
| COTS | Commercial Off-the-Shelf |
| CPU | Central Processing Unit |
| CR | Carriage Return |
| CRC | Cyclic Redundancy Check |
| CRM | Customer Relationship Management |
| CRU | Customer Replaceable Unit |
| CRT | Cathode Ray Tube |
| CRUD | Create, Read, Update, Delete |
| CSA | Cloud Security Alliance |
| CSIRT | Computer Security Incident Response Team |
| CSMA/CD | Carrier Sense Multiple Access with Collision Detection |
| CSP | Cloud Service Provider / Content Security Policy |
| CSR | Certificate Signing Request / Client-Side Rendering |
| CSRF | Cross-Site Request Forgery |
| CSS | Cascading Style Sheets |
| CSV | Comma-Separated Values |
| CTE | Common Table Expression |
| CTO | Chief Technology Officer |
| CV | Computer Vision |
| CVE | Common Vulnerabilities and Exposures |
| D2C | Direct to Consumer |
| D2D | Device-to-Device / Disk-to-Disk |
| D2T | Disk-to-Tape |
| DA | Data Administrator / Destination Address |
| DAA | Data Access Arrangement |
| DaaS | Data as a Service |
| DAB | Digital Audio Broadcasting |
| DAC | Digital-to-Analog Converter |
| DACA | Data Administration Control Area |
| DACL | Discretionary Access Control List |
| DAD | Duplicate Address Detection |
| DAE | Digital Audio Extraction |
| DAI | Dynamic ARP Inspection |
| DAL | Database Abstraction Layer |
| DAM | Digital Asset Management |
| DAML | Digital Asset Modeling Language |
| DAP | Directory Access Protocol |
| DAR | Data at Rest |
| DARI | Database Application Remote Interface |
| DARPA | Defense Advanced Research Projects Agency |
| DAS | Direct Attached Storage |
| DASD | Direct Access Storage Device |
| DASH | Dynamic Adaptive Streaming over HTTP |
| DAT | Digital Audio Tape |
| DATA | Data (Standard abbreviation in protocols) |
| DAV | Distributed Authoring and Versioning |
| DAW | Digital Audio Workstation |
| DB | Database / Decibel |
| DB2 | Database 2 (IBM) |
| DBA | Database Administrator |
| DBCS | Double-Byte Character Set |
| DBE | Database Engine |
| DBMS | Database Management System |
| DBN | Database Name |
| DBO | Database Owner |
| DBR | DOS Boot Record |
| DBS | Direct Broadcast Satellite |
| DC | Data Center / Direct Current / Domain Controller |
| DCA | Defense Communications Agency |
| DCC | Direct Client-to-Client |
| DCCA | Debian Common Core Alliance |
| DCE | Data Communications Equipment |
| DCI | Data Center Interconnect |
| DCL | Data Control Language |
| DCM | Digital Content Management |
| DCOM | Distributed Component Object Model |
| DCS | Distributed Control System |
| DCT | Discrete Cosine Transform |
| DCU | Data Control Unit |
| DD | Data Definition / Double Density |
| DDA | Digital Differential Analyzer |
| DDB | Distributed Database |
| DDBMS | Distributed Database Management System |
| DDC | Display Data Channel |
| DDE | Dynamic Data Exchange |
| DDL | Data Definition Language |
| DDM | Distributed Data Management |
| DDoS | Distributed Denial of Service |
| DDP | Datagram Delivery Protocol |
| DDR | Double Data Rate |
| DDR2 | Double Data Rate 2 |
| DDR3 | Double Data Rate 3 |
| DDR4 | Double Data Rate 4 |
| DDR5 | Double Data Rate 5 |
| DDS | Digital Data Storage / Data Distribution Service |
| DDX | Digital Data Exchange |
| DE | Desktop Environment |
| DEC | Digital Equipment Corporation |
| DECT | Digital Enhanced Cordless Telecommunications |
| DEK | Data Encryption Key |
| DEL | Delete (Character) |
| DEM | Digital Elevation Model |
| DEP | Data Execution Prevention |
| DER | Distinguished Encoding Rules |
| DES | Data Encryption Standard |
| DEV | Developer / Device |
| DevOps | Development and Operations |
| DevSecOps | Development, Security, and Operations |
| DFD | Data Flow Diagram |
| DFS | Distributed File System |
| DFT | Discrete Fourier Transform |
| DGI | Digital Graphics Interface |
| DH | Diffie-Hellman (Key Exchange) |
| DHCP | Dynamic Host Configuration Protocol |
| DHTML | Dynamic HyperText Markup Language |
| DIA | Dedicated Internet Access |
| DICOM | Digital Imaging and Communications in Medicine |
| DID | Direct Inward Dialing / Decentralized Identifier |
| DIF | Data Interchange Format |
| DIFF | Difference (Utility) |
| DIMM | Dual In-line Memory Module |
| DIN | Deutsches Institut für Normung (Standard) |
| DIP | Dual In-line Package |
| DIS | Draft International Standard |
| DISA | Defense Information Systems Agency |
| DISP | Displacement / Display |
| DIX | Digital, Intel, Xerox |
| DKIM | DomainKeys Identified Mail |
| DL | Deep Learning / Download / Dual Layer |
| DLCI | Data Link Connection Identifier |
| DLM | Distributed Lock Manager |
| DLP | Data Loss Prevention / Digital Light Processing |
| DLR | Dynamic Language Runtime |
| DLT | Digital Linear Tape |
| DM | Data Mining / Direct Message |
| DMA | Direct Memory Access |
| DMCA | Digital Millennium Copyright Act |
| DMI | Desktop Management Interface |
| DML | Data Manipulation Language |
| DMM | Digital Multimeter |
| DMS | Document Management System |
| DMT | Discrete Multi-Tone |
| DMV | Dynamic Management View (SQL) |
| DMZ | Demilitarized Zone |
| DN | Distinguished Name |
| DNA | Distributed interNet Applications |
| DNARD | Digital Network Appliance Reference Design |
| DNAT | Destination Network Address Translation |
| DNC | Direct Numerical Control |
| DNS | Domain Name System |
| DNSSEC | Domain Name System Security Extensions |
| DO | Data Object |
| DOA | Dead on Arrival |
| DOCSIS | Data Over Cable Service Interface Specification |
| DOM | Document Object Model |
| DoS | Denial of Service |
| DoT | DNS over TLS |
| DP | DisplayPort / Data Processing |
| DPA | Data Processing Agreement |
| DPC | Deferred Procedure Call |
| DPI | Deep Packet Inspection / Dots Per Inch |
| DPK | Digital Product Key |
| DPM | Data Protection Manager |
| DPMS | Display Power Management Signaling |
| DPO | Data Protection Officer |
| DPP | Direct Print Protocol |
| DPR | Device Pixel Ratio |
| DPS | Data Processing System |
| DPU | Data Processing Unit |
| DQ | Data Quality |
| DR | Disaster Recovery / Data Retention |
| DRAM | Dynamic Random Access Memory |
| DRBD | Distributed Replicated Block Device |
| DRC | Design Rule Check |
| DRDA | Distributed Relational Database Architecture |
| DRM | Digital Rights Management |
| DRO | Data Recovery Operation |
| DRP | Disaster Recovery Plan |
| DRS | Distributed Resource Scheduler |
| DS | Directory Service / Data Structure |
| DSA | Digital Signature Algorithm |
| DSAP | Destination Service Access Point |
| DSD | Direct Stream Digital |
| DSI | Display Serial Interface |
| DSL | Digital Subscriber Line |
| DSLAM | Digital Subscriber Line Access Multiplexer |
| DSLR | Digital Single-Lens Reflex |
| DSM | Distributed Shared Memory |
| DSN | Data Source Name |
| DSP | Digital Signal Processor |
| DSR | Dynamic Source Routing / Direct Server Return |
| DSS | Decision Support System |
| DST | Daylight Saving Time / Drive Self Test |
| DSU | Data Service Unit |
| DTA | Digital Terminal Adapter |
| DTC | Distributed Transaction Coordinator |
| DTE | Data Terminal Equipment |
| DTF | Dynamic Track Following |
| DTLS | Datagram Transport Layer Security |
| DTM | Deterministic Turing Machine |
| DTP | Desktop Publishing / Dynamic Trunking Protocol |
| DTR | Data Terminal Ready / Data Transfer Rate |
| DTS | Digital Theater Systems |
| DTV | Digital Television |
| DU | Disk Usage |
| DUN | Dial-Up Networking |
| DVB | Digital Video Broadcasting |
| DVD | Digital Versatile Disc |
| DVD-R | DVD-Recordable |
| DVD-RW | DVD-Rewritable |
| DVI | Digital Visual Interface |
| DVR | Digital Video Recorder |
| DVS | Distributed Virtual Switch |
| DW | Data Warehouse |
| DWD | Data Warehouse Design |
| DWDM | Dense Wavelength Division Multiplexing |
| DX | DirectX / Developer Experience |
| DXF | Drawing Exchange Format |
| DYDNS | Dynamic Domain Name System |
| EA | Enterprise Architecture |
| EAI | Enterprise Application Integration |
| EAP | Extensible Authentication Protocol |
| EAR | Enterprise Archive (Java) |
| EAV | Entity-Attribute-Value (Database model) |
| EB | Exabyte |
| EBCDIC | Extended Binary Coded Decimal Interchange Code |
| EBP | Enterprise Business Process |
| EBS | Elastic Block Store |
| EC | Electronic Commerce / Edge Computing |
| EC2 | Elastic Compute Cloud |
| ECAD | Electronic Computer-Aided Design |
| ECC | Error Correction Code / Elliptic Curve Cryptography |
| ECDH | Elliptic Curve Diffie-Hellman |
| ECDSA | Elliptic Curve Digital Signature Algorithm |
| ECG | Electrocardiogram (Medical Tech) |
| ECL | Emitter-Coupled Logic |
| ECM | Enterprise Content Management |
| ECN | Explicit Congestion Notification |
| ECO | Engineering Change Order |
| ECS | Elastic Container Service |
| ECU | Electronic Control Unit |
| EDC | Error Detection Code |
| EDI | Electronic Data Interchange |
| EDID | Extended Display Identification Data |
| EDM | Electronic Document Management |
| EDP | Electronic Data Processing |
| EDR | Endpoint Detection and Response |
| EDS | Electronic Data Systems |
| EDT | Eastern Daylight Time / Edit |
| EE | Electrical Engineering |
| EEPROM | Electrically Erasable Programmable ROM |
| EER | Enhanced Entity-Relationship |
| EFA | Exploratory Factor Analysis |
| EFI | Extensible Firmware Interface |
| EFL | English as a Foreign Language (EdTech) |
| EFS | Encrypting File System |
| EGP | Exterior Gateway Protocol |
| EIDE | Enhanced Integrated Drive Electronics |
| EIGRP | Enhanced Interior Gateway Routing Protocol |
| EISA | Extended Industry Standard Architecture |
| EJB | Enterprise JavaBeans |
| EL | Expression Language |
| ELAP | EtherTalk Link Access Protocol |
| ELC | Edge Layer Computing |
| ELF | Executable and Linkable Format |
| ELK | Elasticsearch, Logstash, Kibana (Stack) |
| ELM | Element / Electronic Mail |
| EM | Electromagnetic |
| EMC | Electromagnetic Compatibility |
| EMF | Electromotive Force / Eclipse Modeling Framework |
| EMI | Electromagnetic Interference |
| EMM | Enterprise Mobility Management |
| EMP | Electromagnetic Pulse |
| EMS | Enterprise Management System / Expanded Memory Spec |
| EMV | Europay, Mastercard, and Visa (Standard) |
| EN | Ethernet / Enable |
| ENC | Encode |
| END | End of Data / End of Transmission |
| EOB | End of Block |
| EOF | End of File |
| EOL | End of Life / End of Line |
| EOM | End of Message |
| EOP | End of Page / End of Packet |
| EOS | End of Support / End of Stream |
| EOT | End of Transmission |
| EP | Endpoint |
| EPA | Environmental Protection Agency (Energy Star) |
| EPC | Electronic Product Code |
| EPI | Endpoint Protection Infrastructure |
| EPIC | Explicitly Parallel Instruction Computing |
| EPL | Electronic Programming Language |
| EPP | Enhanced Parallel Port / Extensible Provisioning |
| EPROM | Erasable Programmable Read-Only Memory |
| EPS | Encapsulated PostScript |
| ERP | Enterprise Resource Planning |
| ERR | Error |
| ES | Expert System / Enterprise Service |
| ESA | European Space Agency (Space Tech) |
| ESB | Enterprise Service Bus |
| ESC | Escape (Key) |
| ESD | Electrostatic Discharge |
| ESE | Extensible Storage Engine |
| ESM | Enterprise Security Management |
| ESN | Electronic Serial Number |
| ESP | Encapsulating Security Payload / Extensible Service |
| ESR | Equivalent Series Resistance |
| ESS | Extended Service Set |
| EST | Eastern Standard Time |
| ETL | Extract, Transform, Load |
| ETM | Enterprise Transaction Management |
| ETR | Expected Throughput Rate |
| ETS | Ethernet Switch |
| ETX | End of Text |
| EU | End User |
| EUI | Extended Unique Identifier |
| EULA | End-User License Agreement |
| EVM | Earned Value Management / Ethereum Virtual Machine |
| EVPN | Ethernet Virtual Private Network |
| EVP | Executive Vice President |
| EW | Electronic Warfare |
| EWS | Early Warning System / Exchange Web Services |
| EX | Execute |
| EXC | Exception |
| EXE | Executable (File extension) |
| EXT | Extended / Extension |
| FAAS | Function as a Service |
| FAT | File Allocation Table |
| FB | Facebook / Frame Buffer |
| FBC | Frame Buffer Compression |
| FBO | Frame Buffer Object |
| FC | Fibre Channel |
| FCC | Federal Communications Commission |
| FCS | Frame Check Sequence |
| FDD | Floppy Disk Drive / Frequency Division Duplexing |
| FDDI | Fiber Distributed Data Interface |
| FDE | Full Disk Encryption |
| FDI | Foreign Direct Investment (in Tech sector) |
| FDM | Frequency Division Multiplexing |
| FDMA | Frequency Division Multiple Access |
| FE | Fast Ethernet / Front-End |
| FEC | Forward Error Correction |
| FED | Field Emission Display |
| FEM | Finite Element Method |
| FET | Field-Effect Transistor |
| FF | Flip-Flop |
| FFMPEG | Fast Forward Moving Picture Experts Group |
| FFT | Fast Fourier Transform |
| FHSS | Frequency-Hopping Spread Spectrum |
| FI | Fault Injection |
| FIFO | First-In, First-Out |
| FILO | First-In, Last-Out |
| FIN | Finish (TCP Flag) |
| FIPS | Federal Information Processing Standards |
| FIR | Fast Infrared / Finite Impulse Response |
| FIS | Financial Information System |
| FL | Flash / Flow Language |
| FLAC | Free Lossless Audio Codec |
| FLA | Flash Memory |
| FLOPS | Floating-point Operations Per Second |
| FLOW | Flowchart |
| FLP | Floppy Disk |
| FM | Frequency Modulation |
| FMEA | Failure Mode and Effects Analysis |
| FMS | File Management System |
| FNC | Function |
| FOD | Feature on Demand |
| FOIA | Freedom of Information Act (Data Privacy) |
| FOMO | Fear of Missing Out (Social Tech psychology) |
| FONT | Font (Typography) |
| FOR | Formula / Loop (Programming) |
| FORTRAN | Formula Translation |
| FOS | File Operating System |
| FOSS | Free and Open Source Software |
| FOT | Fiber Optic Technology |
| FP | Floating Point / Function Point |
| FPGA | Field-Programmable Gate Array |
| FPI | Frames Per Inch |
| FPL | Field-Programmable Logic |
| FPM | Fast Page Mode |
| FPU | Floating-Point Unit |
| FQDN | Fully Qualified Domain Name |
| FR | Frame Rate / Frame Relay |
| FRAM | Ferroelectric RAM |
| FRD | Functional Requirements Document |
| FS | File System |
| FSB | Front Side Bus |
| FSCK | File System Check |
| FSD | File System Driver |
| FSM | Finite State Machine |
| FSN | Full Service Network |
| FSO | Free-Space Optics |
| FSP | File Service Protocol |
| FST | File System Type |
| FT | Fault Tolerance |
| FTAM | File Transfer, Access, and Management |
| FTC | Federal Trade Commission |
| FTL | Flash Translation Layer |
| FTN | FidoNet Technology Network |
| FTP | File Transfer Protocol |
| FTPS | FTP over SSL |
| FTR | Fault-Tolerant Redundancy |
| FTS | File Transfer Service |
| FTTB | Fiber to the Building |
| FTTC | Fiber to the Cabinet |
| FTTH | Fiber to the Home |
| FTTN | Fiber to the Node |
| FTTP | Fiber to the Premises |
| FULL | Full Duplex |
| FW | Firmware / Firewall |
| FWIW | For What It's Worth (Net slang) |
| FWS | Firewall System |
| FX | Effects / Foreign Exchange |
| FXP | File eXchange Protocol |
| GA | Genetic Algorithm |
| GAAP | Generally Accepted Accounting Principles |
| GAC | Global Assembly Cache |
| GAN | Generative Adversarial Network |
| GAP | Global Address List / Gateway Access Protocol |
| GAS | Google Apps Script |
| Gb | Gigabit |
| GB | Gigabyte |
| GBA | Game Boy Advance |
| GBIC | Gigabit Interface Converter |
| GBP | Gigabit Backplane |
| GCC | GNU Compiler Collection |
| GCF | Greatest Common Factor |
| GCI | Google Code-in |
| GCM | Galois/Counter Mode (Encryption) |
| GCR | Group Code Recording |
| GDI | Graphics Device Interface |
| GDPR | General Data Protection Regulation |
| GDS | Global Directory Service |
| GDSS | Group Decision Support System |
| GE | Gigabit Ethernet |
| GEMS | Global Enterprise Management System |
| GEO | Geostationary Earth Orbit |
| GFS | Google File System |
| GHz | Gigahertz |
| GIGO | Garbage In, Garbage Out |
| GIMP | GNU Image Manipulation Program |
| GIS | Geographic Information System |
| GITS | Global Information Technology Services |
| GL | Graphics Library (OpenGL) |
| GLC | Gateway Location Register |
| GLES | OpenGL for Embedded Systems |
| GLI | Graphical Language Interface |
| GLO | Global |
| GLP | General Public License (GPL) |
| GML | Geography Markup Language |
| GMT | Greenwich Mean Time |
| GNOME | GNU Network Object Model Environment |
| GNU | GNU's Not Unix |
| GOP | Group of Pictures (Video compression) |
| GOTO | Go To (Programming command) |
| GP | General Purpose |
| GPA | General Packet Assembly |
| GPF | General Protection Fault |
| GPS | Global Positioning System |
| GPIB | General Purpose Interface Bus |
| GPL | General Public License |
| GPM | General Purpose Machine |
| GPO | Group Policy Object |
| GPRS | General Packet Radio Service |
| GPS | Global Positioning System |
| GPU | Graphics Processing Unit |
| GR | General Register |
| GRUB | GRand Unified Bootloader |
| GS | Ghostscript / Global System |
| GSA | Google Search Appliance |
| GSI | Global System Integration |
| GSM | Global System for Mobile Communications |
| GSO | Geosynchronous Orbit |
| GSP | Graphics System Processor |
| GSS | Generic Security Services |
| GT | Gigabit Transfer |
| GTO | Gate Turn-Off (Thyristor) |
| GTP | GPRS Tunnelling Protocol |
| GTR | Gateway Transmission Rate |
| GTS | Guaranteed Time Slot |
| GUI | Graphical User Interface |
| GUID | Globally Unique Identifier |
| GUL | Graphical User Language |
| GVM | Global Virtual Machine |
| GWS | Gateway Service |
| HA | High Availability |
| HAC | High Availability Cluster |
| HAL | Hardware Abstraction Layer |
| HBA | Host Bus Adapter |
| HCI | Human-Computer Interaction / Hyper-Converged Infrastructure |
| HCP | Host Configuration Protocol |
| HDD | Hard Disk Drive |
| HDL | Hardware Description Language |
| HDLC | High-Level Data Link Control |
| HDMI | High-Definition Multimedia Interface |
| HDR | High Dynamic Range |
| HDTV | High-Definition Television |
| HEVC | High Efficiency Video Coding |
| HF | High Frequency |
| HFC | Hybrid Fiber-Coaxial |
| HFT | High-Frequency Trading |
| HHD | Hybrid Hard Drive |
| HID | Human Interface Device |
| HIDS | Host-based Intrusion Detection System |
| HIPS | Host-based Intrusion Prevention System |
| HLR | Home Location Register |
| HLS | HTTP Live Streaming |
| HMA | High Memory Area |
| HMD | Head-Mounted Display |
| HMAC | Hash-based Message Authentication Code |
| HMI | Human-Machine Interface |
| HMP | Host Messaging Protocol |
| HPC | High-Performance Computing |
| HPI | Host Printer Interface |
| HPP | Hewlett-Packard Printer (Control Language) |
| HPS | High Performance Switch |
| HQ | Headquarters (often used for data centers) |
| HRD | Hard Disk |
| HRM | Human Resource Management (Tech platforms) |
| HSDPA | High-Speed Downlink Packet Access |
| HSI | High-Speed Interconnect |
| HSM | Hardware Security Module |
| HSPA | High-Speed Packet Access |
| HSR | High-availability Seamless Redundancy |
| HST | High-Speed Technology / Host |
| HT | Hyper-Threading / HyperText |
| HTCPCP | Hyper Text Coffee Pot Control Protocol |
| HTML | HyperText Markup Language |
| HTPC | Home Theater Personal Computer |
| HTTP | HyperText Transfer Protocol |
| HTTPS | HyperText Transfer Protocol Secure |
| HTX | HyperTransport eXpansion |
| HUD | Heads-Up Display |
| HW | Hardware |
| HWID | Hardware Identifier |
| HYB | Hybrid |
| IA | Information Architecture / Intelligent Agent |
| IANA | Internet Assigned Numbers Authority |
| IAS | Information Access System |
| IBM | International Business Machines |
| IC | Integrated Circuit |
| ICA | Independent Computing Architecture |
| ICANN | Internet Corporation for Assigned Names and Numbers |
| ICE | In-Circuit Emulator |
| ICMP | Internet Control Message Protocol |
| ICP | Internet Cache Protocol |
| ICS | Industrial Control System |
| ICU | Instruction Control Unit |
| ID | Identifier / Identification |
| IDA | Integrated Data Access |
| IDE | Integrated Development Environment |
| IDL | Interface Definition Language |
| IDM | Identity Management |
| IDP | Intrusion Detection and Prevention |
| IDR | Intelligent Document Recognition |
| IDS | Intrusion Detection System |
| IDSL | ISDN Digital Subscriber Line |
| IE | Internet Explorer |
| IEC | International Electrotechnical Commission |
| IEEE | Institute of Electrical and Electronics Engineers |
| IETF | Internet Engineering Task Force |
| IF | Interface |
| IFR | Information Retrieval |
| IFS | Installable File System |
| IGMP | Internet Group Management Protocol |
| IGP | Interior Gateway Protocol |
| IHS | Internet Health Service |
| IHV | Independent Hardware Vendor |
| IIOP | Internet Inter-ORB Protocol |
| IIS | Internet Information Services |
| IL | Intermediate Language |
| ILE | Integrated Language Environment |
| IM | Instant Messaging |
| IMAP | Internet Message Access Protocol |
| IMG | Image |
| IMI | Initial Module Interface |
| IMR | Internet Message Relay |
| IMU | Inertial Measurement Unit |
| IN | Intelligent Network |
| IOC | Indicators of Compromise / Inversion of Control |
| IO | Input/Output |
| IOC | Input/Output Controller |
| IOMMU | Input/Output Memory Management Unit |
| IOR | Interoperable Object Reference |
| IOS | iPhone Operating System / Internetwork OS |
| IOT | Internet of Things |
| IP | Internet Protocol / Intellectual Property |
| IPA | Intelligent Personal Assistant |
| IPC | Inter-Process Communication |
| IPCP | IP Control Protocol |
| IPD | Information Processing Device |
| IPM | Intelligent Platform Management |
| IPMI | Intelligent Platform Management Interface |
| IPP | Internet Printing Protocol |
| IPsec | Internet Protocol Security |
| IPTV | Internet Protocol Television |
| IPv4 | Internet Protocol version 4 |
| IPv6 | Internet Protocol version 6 |
| IPX | Internetwork Packet Exchange |
| IR | Infrared / Information Retrieval |
| IRC | Internet Relay Chat |
| IRD | Integrated Receiver Decoder |
| IRL | In Real Life |
| IRM | Information Rights Management |
| IRQ | Interrupt Request |
| IRR | Internet Routing Registry |
| IS | Information System |
| ISA | Industry Standard Architecture / Instruction Set Arch. |
| ISAM | Indexed Sequential Access Method |
| ISAPI | Internet Server Application Programming Interface |
| ISCSI | Internet Small Computer Systems Interface |
| ISDN | Integrated Services Digital Network |
| ISH | Information Superhighway |
| ISI | Inter-Symbol Interference |
| ISL | Inter-Switch Link |
| ISM | Industrial, Scientific, and Medical (Radio band) |
| ISO | International Organization for Standardization |
| ISP | Internet Service Provider |
| ISR | Interrupt Service Routine |
| ISV | Independent Software Vendor |
| IT | Information Technology |
| ITA | Information Technology Architecture |
| ITIL | Information Technology Infrastructure Library |
| IV | Initialization Vector |
| IVR | Interactive Voice Response |
| IXP | Internet Exchange Point |
| J2EE | Java 2 Platform, Enterprise Edition |
| J2ME | Java 2 Platform, Micro Edition |
| J2SE | Java 2 Platform, Standard Edition |
| JAAS | Java Authentication and Authorization Service |
| JACK | Jack Audio Connection Kit |
| JAR | Java Archive |
| JAS | Java Application Server |
| JAXB | Java Architecture for XML Binding |
| JAXP | Java API for XML Processing |
| JAX-RS | Java API for RESTful Web Services |
| JAX-WS | Java API for XML Web Services |
| JBOD | Just a Bunch Of Disks |
| JCL | Job Control Language |
| JDBC | Java Database Connectivity |
| JDK | Java Development Kit |
| JDM | Java Data Mining |
| JDO | Java Data Objects |
| JEE | Jakarta Enterprise Edition |
| JEPA | Joint European Submicron Silicon Initiative |
| JES | Job Entry Subsystem |
| JFET | Junction Field-Effect Transistor |
| JFS | Journaling File System |
| JIT | Just-In-Time (Compilation) |
| JMS | Java Message Service |
| JNDI | Java Naming and Directory Interface |
| JNI | Java Native Interface |
| JPA | Jakarta Persistence API |
| JRE | Java Runtime Environment |
| JSP | JavaServer Pages |
| JSON | JavaScript Object Notation |
| JSR | Java Specification Request |
| JTAG | Joint Test Action Group |
| JU | JUnit (Java Unit Testing) |
| JVM | Java Virtual Machine |
| JWT | JSON Web Token |
| K8s | Kubernetes |
| KAME | KAME Project (IPv6/IPsec implementation) |
| KB | Kilobyte |
| KBD | Keyboard |
| KBE | Knowledge-Based Engineering |
| KBM | Knowledge-Based Management |
| KBR | Keyboard Rate |
| KBS | Knowledge-Based System |
| KC | Kernel Configuration |
| KDC | Key Distribution Center |
| KEK | Key Encryption Key |
| KEM | Key Encapsulation Mechanism |
| KF | Kernel Framework |
| KFI | Kernel Function Interface |
| KHz | Kilohertz |
| KIE | Knowledge Is Everything / Knowledge Integration Env. |
| KIP | K-Internet Protocol |
| KL | Key Logging / Kernel Level |
| KM | Knowledge Management |
| KMS | Key Management Service |
| KNI | Kernel Network Interface |
| KOS | Kernel Operating System |
| KPI | Key Performance Indicator |
| KPS | Keys Per Second |
| KRB | Kerberos |
| KVM | Kernel-based Virtual Machine |
| LA | Logic Analyzer |
| LAA | Locally Administered Address |
| LAN | Local Area Network |
| LAP | Link Access Protocol |
| LAPB | Link Access Procedure, Balanced |
| LAS | Laser / Local Area Switch |
| LAT | Local Area Transport |
| LB | Load Balancing |
| LBA | Logical Block Addressing |
| LBP | Laser Beam Printer |
| LC | Link Control / Liquid Crystal |
| LCC | Leadless Chip Carrier |
| LCD | Liquid Crystal Display |
| LCI | Link Connection Identifier |
| LCR | Least Cost Routing |
| LCS | Location Services |
| LD | Laser Disc / Logical Drive |
| LDA | Local Data Area |
| LDAP | Lightweight Directory Access Protocol |
| LDC | Lead-in Data Carrier |
| LDI | Load Immediate |
| LDL | Low-Density Library |
| LDM | Local Data Manager |
| LDP | Label Distribution Protocol |
| LDR | Loader |
| LDS | Local Directory Service |
| LED | Light Emitting Diode |
| LEM | Local Edit Mode |
| LEP | Light Emitting Polymer |
| LFS | Linux From Scratch / Log-structured File System |
| LGPL | Lesser General Public License |
| LI | Link Interface / Line Interface |
| LIB | Library |
| LIC | Line Interface Card |
| LIFO | Last-In, First-Out |
| LIM | Lotus-Intel-Microsoft (Expanded Memory Spec) |
| LINUX | Linus's Unix |
| LIP | Logical IP |
| LISP | List Processing (Language) |
| LIS | Logical IP Subnet |
| LLC | Logical Link Control |
| LLD | Low-Level Design |
| LLM | Large Language Model |
| LLVM | Low Level Virtual Machine |
| LM | License Manager / Local Memory |
| LMI | Local Management Interface |
| LMS | Learning Management System |
| LNK | Link (File extension) |
| LOC | Lines of Code |
| LOI | Letter of Intent |
| LPD | Line Printer Daemon |
| LPI | Lines Per Inch |
| LPR | Line Printer Remote |
| LPT | Line Printer Terminal |
| LRU | Least Recently Used (Caching policy) |
| LS | Link State / List (Command) |
| LSB | Least Significant Bit |
| LSC | Link State Control |
| LSD | Least Significant Digit |
| LSI | Large-Scale Integration |
| LSP | Label Switched Path |
| LSR | Label Switch Router |
| LSS | Link State Sequence |
| LT | Link Table / Line Termination |
| LTA | Long-Term Archive |
| LTE | Long-Term Evolution |
| LTM | Local Traffic Manager |
| LTS | Long-Term Support |
| LU | Logical Unit |
| LUA | Moon (Language) |
| LUN | Logical Unit Number |
| LVD | Low Voltage Differential |
| LVM | Logical Volume Manager |
| LWC | Lightweight Cryptography |
| LZ | Lempel-Ziv (Compression algorithm) |
| MA | Media Access / Multiple Access |
| MAC | Media Access Control / Message Auth. Code |
| MACA | Multiple Access with Collision Avoidance |
| MAN | Metropolitan Area Network |
| MANET | Mobile Ad hoc Network |
| MAP | Manufacturing Automation Protocol |
| MAPI | Messaging Application Programming Interface |
| MAR | Memory Address Register |
| MAS | Multi-Agent System |
| MASC | Multicast Address Server |
| MAU | Media Access Unit / Multistation Access Unit |
| MB | Megabyte |
| MBAS | Master of Business Administration in Systems |
| MBONE | Multicast Backbone |
| MBPS | Megabits Per Second |
| MBR | Master Boot Record |
| MCA | Micro Channel Architecture |
| MCAD | Mechanical Computer-Aided Design |
| MCB | Memory Control Block |
| MCC | Mobile Country Code |
| MCD | Mini Client Driver |
| MCE | Media Center Edition |
| MCI | Media Control Interface |
| MCL | Macro Command Language |
| MCM | Multi-Chip Module |
| MCP | Microsoft Certified Professional |
| MCR | Magnetic Card Reader |
| MCS | Microsoft Certified Systems |
| MCU | Microcontroller Unit / Multipoint Control Unit |
| MD | Minidisc / Markdown |
| MDA | Monochrome Display Adapter |
| MDC | Management Data Clock |
| MDDI | Mobile Display Digital Interface |
| MDI | Multiple Document Interface |
| MDM | Mobile Device Management |
| MDMA | Multi-mode Direct Memory Access |
| MDP | Mobile Data Protocol |
| MDR | Memory Data Register |
| MDS | Metadata Services |
| MDX | Multidimensional Expressions |
| ME | Millennium Edition (Windows) / Management Engine |
| MEA | Multi-Element Array |
| MEM | Memory |
| MES | Manufacturing Execution System |
| MEW | Mobile Electronic Wallet |
| MF | Mainframe / Microfiche |
| MFC | Microsoft Foundation Class |
| MFD | Multi-Function Device |
| MFI | Made for iPhone/iPod/iPad |
| MFLOPS | Million Floating-Point Operations Per Second |
| MFM | Modified Frequency Modulation |
| MFP | Multi-Function Printer |
| MFT | Master File Table |
| MFV | Multi-Frequency V |
| MGCP | Media Gateway Control Protocol |
| MGP | Monochrome Graphics Adapter |
| MGT | Management |
| MH | Message Handling |
| MHEG | Multimedia and Hypermedia Experts Group |
| MHz | Megahertz |
| MIB | Management Information Base |
| MIC | Microphone / Message Integrity Code |
| MID | Mobile Internet Device |
| MIDI | Musical Instrument Digital Interface |
| MIME | Multipurpose Internet Mail Extensions |
| MIMO | Multiple Input, Multiple Output |
| MIN | Mobile Identification Number |
| MIPS | Million Instructions Per Second |
| MIS | Management Information System |
| MISC | Miscellaneous |
| MISO | Master In, Slave Out |
| MIT | Massachusetts Institute of Technology |
| ML | Machine Learning / Markup Language |
| MLA | Multilateral Agreement |
| MLD | Multicast Listener Discovery |
| MLE | Maximum Likelihood Estimation |
| MLI | Multiple Link Interface |
| MLM | Multilevel Marketing (often used in IT platforms) |
| MLP | Multilayer Perceptron |
| MLS | Multi-Level Security |
| MLT | Multi-Level Transmit |
| MM | Multimedia / Main Memory |
| MMA | Multimedia Messaging Architecture |
| MMC | Microsoft Management Console / MultiMediaCard |
| MMF | Multimedia File |
| MMI | Man-Machine Interface |
| MMO | Massively Multiplayer Online (Game) |
| MMORPG | Massively Multiplayer Online Role-Playing Game |
| MMP | Massively Parallel Processing |
| MMS | Multimedia Messaging Service |
| MMU | Memory Management Unit |
| MMX | Multimedia Extensions |
| MNP | Microcom Networking Protocol |
| MO | Magneto-Optical / Managed Object |
| MOB | Mobile |
| MOBI | Mobipocket (E-book format) |
| MOD | Modular / Modify / Model |
| MOM | Message-Oriented Middleware |
| MON | Monitor |
| MOO | MUD Object Oriented |
| MOPS | Million Operations Per Second |
| MOR | Magneto-Optical Rewritable |
| MOS | Metal-Oxide-Semiconductor |
| MOSFET | Metal-Oxide-Semiconductor Field-Effect Transistor |
| MOT | Message Object Transfer |
| MOU | Memorandum of Understanding |
| MOV | Movie (File extension) |
| MP | Microprocessor / Multi-Processing |
| MP3 | MPEG-1 Audio Layer 3 |
| MP4 | MPEG-4 Part 14 |
| MPA | Multicast Process Agent |
| MPC | Multimedia Personal Computer |
| MPEG | Moving Picture Experts Group |
| MPI | Message Passing Interface |
| MPLS | Multiprotocol Label Switching |
| MPM | Message Processing Module |
| MPP | Massively Parallel Processing |
| MPR | Multi-Protocol Router |
| MPS | Multi-Programming System |
| MPT | Multi-Point Terminal |
| MPU | Microprocessor Unit |
| MQ | Message Queue |
| MQIS | Message Queuing Information Service |
| MR | Memory Register / Mobile Radio |
| MRA | Mobile Remote Access |
| MRB | Memory Request Buffer |
| MRC | Magnetic Recording Code |
| MRM | Mobile Resource Management |
| MRP | Material Requirements Planning |
| MRS | Media Recognition System |
| MRT | Message Routing Table |
| MRU | Most Recently Used |
| MS | Microsoft / Memory Stick / Main Storage |
| MSA | Media Systems Architecture |
| MSB | Most Significant Bit |
| MSC | Mobile Switching Center |
| MSD | Most Significant Digit |
| MSDN | Microsoft Developer Network |
| MSI | Medium-Scale Integration / MSI Installer |
| MSK | Minimum Shift Keying |
| MSL | Managed Services Layer |
| MSM | Mobile Station Modem |
| MSP | Managed Service Provider |
| MSR | Model Specific Register |
| MSS | Maximum Segment Size |
| MST | Multicast Spanning Tree |
| MT | Machine Translation / Megatransfer |
| MTA | Message Transfer Agent |
| MTBF | Mean Time Between Failures |
| MTB | Memory Test Board |
| MTC | Main Terminal Cabinet |
| MTD | Memory Technology Device |
| MTF | Modular Transfer Function |
| MTI | Moving Target Indicator |
| MTL | Metal-To-Logic |
| MTM | Mobile Terminal Management |
| MTM | Multi-Tasking Monitor |
| MTO | Make-to-Order |
| MTP | Media Transfer Protocol |
| MTR | Memory Test Routine |
| MTS | Message Transfer Service / Multi-Tasking System |
| MTTF | Mean Time To Failure |
| MTTR | Mean Time To Repair |
| MTU | Maximum Transmission Unit |
| MTV | Music Television (Tech reference for early streaming) |
| MU | Memory Unit |
| MUD | Multi-User Dungeon |
| MUL | Multiply |
| MUM | Multi-User Mode |
| MUP | Multi-Use Processor |
| MUSE | Multiple Sub-Nyquist Sampling Encoding |
| MUT | Multi-Unit Test |
| MUX | Multiplexer |
| MV | Micro-Version |
| MVC | Model-View-Controller |
| MVD | Multi-View Display |
| MVM | Multi-Virtual Machine |
| MVP | Minimum Viable Product |
| MVS | Multiple Virtual Storage |
| MW | Middleware / Microwave |
| MWA | Mobile Web Application |
| MWS | Mobile Web Services |
| MX | Mail Exchange (Record) |
| NA | Network Administrator / Not Applicable |
| NAA | Network Access Authority |
| NAC | Network Access Control |
| NACL | Network Access Control List |
| NAD | Network Access Device |
| NAK | Negative Acknowledgment |
| NAL | Network Abstraction Layer |
| NAM | Network Access Module |
| NAND | Not-AND (Logic gate / Flash memory type) |
| NAN | Not a Number |
| NAP | Network Access Point |
| NAS | Network Attached Storage |
| NASA | National Aeronautics and Space Administration |
| NAT | Network Address Translation |
| NAV | Network Allocation Vector |
| NB | Notebook / Northbridge |
| NBA | Narrowband |
| NBI | Northbound Interface |
| NBMA | Non-Broadcast Multi-Access |
| NBS | National Bureau of Standards |
| NBT | NetBIOS over TCP/IP |
| NC | Network Computer / Normally Closed |
| NCC | Network Control Center |
| NCG | Network Configuration Group |
| NCL | Network Control Language |
| NCP | Network Control Protocol |
| NCR | National Cash Register (Tech company) |
| NCS | Network Computing System |
| NCU | Network Control Unit |
| NDA | Non-Disclosure Agreement |
| NDB | Network Database |
| NDIS | Network Driver Interface Specification |
| NDP | Neighbor Discovery Protocol |
| NDR | Network Data Representation |
| NE | Network Element |
| NEC | Nippon Electric Company |
| NED | Network Editor |
| NEP | Network Equipment Provider |
| NES | Nintendo Entertainment System |
| NET | Network |
| NETBIOS | Network Basic Input/Output System |
| NETUI | Network User Interface |
| NEW | Newline |
| NFS | Network File System |
| NFV | Network Functions Virtualization |
| NG | Next Generation |
| NGN | Next Generation Network |
| NGS | Next Generation Sequencing |
| NHRP | Next Hop Resolution Protocol |
| NIC | Network Interface Card |
| NID | Network Interface Device |
| NIDS | Network Intrusion Detection System |
| NIF | Network Information File |
| NII | National Information Infrastructure |
| NIL | Nothing / Null |
| NIM | Network Interface Module |
| NIPS | Network Intrusion Prevention System |
| NIS | Network Information Service |
| NISC | Network Instruction Set Computer |
| NIT | Network Information Table |
| NJ | Network Job |
| NL | New Line |
| NLA | Network Location Awareness |
| NLB | Network Load Balancing |
| NLE | Non-Linear Editing |
| NLP | Natural Language Processing |
| NLS | Network Licensing System |
| NLU | Natural Language Understanding |
| NM | Network Management |
| NMA | Network Management Architecture |
| NMC | Network Management Center |
| NMI | Non-Maskable Interrupt |
| NML | Network Management Layer |
| NMP | Network Management Protocol |
| NMS | Network Management System |
| NMT | Nordic Mobile Telephone |
| NN | Neural Network |
| NNI | Network-to-Network Interface |
| NNP | Neural Network Processor |
| NNTP | Network News Transfer Protocol |
| NO | Normally Open |
| NOC | Network Operations Center |
| NOD | Network Object Design |
| NODE | Network Node |
| NOS | Network Operating System |
| NOT | Not (Logical operator) |
| NP | Nondeterministic Polynomial (Complexity Class) |
| NPA | Numbering Plan Area |
| NPC | Non-Player Character |
| NPI | Network Printer Interface |
| NPU | Neural Processing Unit / Network Processing Unit |
| NQS | Network Queuing System |
| NR | Non-Return / New Release |
| NRI | Network Resource Indicator |
| NRM | Network Resource Management |
| NRZ | Non-Return to Zero (Signal encoding) |
| NS | Name Server / Network Service |
| NSA | National Security Agency |
| NSAPI | Netscape Server API |
| NSC | Network Switching Center |
| NSD | Network Software Description |
| NSI | Network Service Interface |
| NSM | Network Security Management |
| NSO | Network Service Orchestration |
| NSP | Network Service Provider |
| NSR | Network Status Register |
| NST | Network Security Tool |
| NSX | Network Virtualization (VMware product) |
| NT | New Technology (Windows NT) |
| NTA | Network Traffic Analyzer |
| NTP | Network Time Protocol |
| NTR | Network Timing Reference |
| NTS | Network Time Security |
| NTT | Nippon Telegraph and Telephone |
| NUI | Natural User Interface |
| NUMA | Non-Uniform Memory Access |
| NV | Non-Volatile |
| NVCC | NVIDIA CUDA Compiler |
| NVDS | Non-Volatile Data Storage |
| NVME | Non-Volatile Memory Express |
| NVM | Non-Volatile Memory |
| NVRAM | Non-Volatile Random Access Memory |
| NW | Network |
| OA | Office Automation |
| OAD | Object-Oriented Analysis and Design |
| OAM | Operations, Administration, and Maintenance |
| OAS | Office Automation System |
| OASIS | Organization for the Advancement of Structured Information Standards |
| OBD | On-Board Diagnostics |
| OBI | Open Buying on the Internet |
| OBM | Object-Based Modeling |
| OC | Optical Carrier / Object Code |
| OCA | Oracle Certified Associate |
| OCB | Offset Codebook (Encryption mode) |
| OCC | Optical Cross-Connect |
| OCD | Object-Oriented Component Design |
| OCE | Oracle Certified Expert |
| OCF | Open Computing Foundation |
| OCH | Optical Channel |
| OCI | Open Container Initiative |
| OCL | Object Constraint Language |
| OCP | Oracle Certified Professional |
| OCR | Optical Character Recognition |
| OCS | Office Communication Server |
| OCT | Octet |
| OCX | OLE Control eXtension |
| ODBC | Open Database Connectivity |
| ODC | Orthogonal Defect Classification |
| ODI | Open Data-Link Interface |
| ODL | Object Definition Language |
| ODM | Object Data Manager |
| ODMA | Open Document Management API |
| ODMG | Object Database Management Group |
| ODP | Open Distributed Processing |
| ODR | Object Data Representation |
| ODS | Operational Data Store |
| ODT | Open Document Text |
| OE | Outlook Express |
| OEM | Original Equipment Manufacturer |
| OEP | Original Entry Point |
| OER | Open Educational Resources |
| OES | Open Enterprise Server |
| OF | Overflow |
| OFB | Output Feedback (Encryption mode) |
| OFDM | Orthogonal Frequency-Division Multiplexing |
| OFDMA | Orthogonal Frequency-Division Multiple Access |
| OFF | Offline / Off |
| OFP | Optical Fiber Port |
| OFS | Object File System |
| OFT | Optical Fiber Technology |
| OGC | Open Geospatial Consortium |
| OH | Overhead |
| OI | Operator Interface |
| OIC | Object Interface Controller |
| OIL | Ontology Inference Layer |
| OIS | Office Information System |
| OJ | Open Job |
| OLAP | Online Analytical Processing |
| OLC | Online Learning Center |
| OLE | Object Linking and Embedding |
| OLTP | Online Transaction Processing |
| OM | Object Model / Operations Management |
| OMA | Open Mobile Alliance |
| OMG | Object Management Group |
| OMI | Open Management Interface |
| OML | Operations Management Language |
| OMR | Optical Mark Recognition |
| OMS | Operations Management System |
| ON | On / Online |
| ONC | Open Network Computing |
| OO | Object-Oriented |
| OOA | Object-Oriented Analysis |
| OOD | Object-Oriented Design |
| OOI | Object-Oriented Interface |
| OOL | Object-Oriented Language |
| OOM | Object-Oriented Modeling / Out of Memory |
| OOP | Object-Oriented Programming |
| OOPS | Object-Oriented Programming System |
| OOS | Out of Service |
| OOT | Object-Oriented Technology |
| OP | Operation / Operator / Optical |
| OPC | OLE for Process Control |
| OPC-UA | OPC Unified Architecture |
| OPI | Open Prepress Interface |
| OPL | Open Programming Language |
| OPM | Operations Per Minute |
| OPS | Operations / Operations Per Second |
| OPT | Option / Optical |
| OR | OR (Logical operator) |
| ORB | Object Request Broker |
| ORM | Object-Relational Mapping |
| OS | Operating System |
| OSD | On-Screen Display |
| OSF | Open Software Foundation |
| OSI | Open Systems Interconnection |
| OSPF | Open Shortest Path First |
| OSS | Open Source Software / Operations Support System |
| OST | Offline Storage Table |
| OTA | Over-the-Air |
| OTC | Over-the-Counter (Tech trading) |
| OTDR | Optical Time-Domain Reflectometer |
| OTP | One-Time Password |
| OTS | Off-the-Shelf |
| OTT | Over-the-Top (Streaming) |
| OU | Organizational Unit |
| OUI | Organizationally Unique Identifier |
| OUT | Output |
| OV | Overlay |
| OVAL | Open Vulnerability and Assessment Language |
| OVM | Oracle VM |
| OWL | Web Ontology Language |
| OX | Open-Xchange |
| PAAS | Platform as a Service |
| PAC | Proxy Auto-Configuration |
| PAN | Personal Area Network |
| PAP | Password Authentication Protocol |
| PAR | Parallel / Positive Acknowledgment with Retransmission |
| PAT | Port Address Translation |
| PB | Petabyte |
| PBA | Physical Block Address |
| PBC | Peripheral Bus Controller |
| PBI | Peripheral Bus Interface |
| PBX | Private Branch Exchange |
| PC | Personal Computer / Program Counter |
| PCA | Principal Component Analysis |
| PCB | Printed Circuit Board / Process Control Block |
| PCC | Policy and Charging Control |
| PCI | Peripheral Component Interconnect |
| PCIe | PCI Express |
| PCM | Pulse Code Modulation |
| PCMCIA | Personal Computer Memory Card International Association |
| PCP | Priority Code Point |
| PCR | Program Clock Reference |
| PCS | Personal Communication Services |
| PCT | Private Communications Technology |
| PCU | Peripheral Control Unit |
| PD | Public Domain / Photodiode |
| PDA | Personal Digital Assistant |
| PDC | Primary Domain Controller |
| Portable Document Format | |
| PDH | Plesiochronous Digital Hierarchy |
| PDI | Peripheral Data Interface |
| PDL | Page Description Language |
| PDM | Pulse Density Modulation |
| PDN | Public Data Network |
| PDO | PHP Data Objects |
| PDP | Programmed Data Processor |
| PDR | Packet Delivery Ratio |
| PDU | Protocol Data Unit |
| PE | Provider Edge |
| PEAP | Protected Extensible Authentication Protocol |
| PEG | Peripheral Expansion Group |
| PEM | Privacy Enhanced Mail |
| PEP | Policy Enforcement Point |
| PERL | Practical Extraction and Reporting Language |
| PERT | Program Evaluation and Review Technique |
| PES | Packetized Elementary Stream |
| PET | Personal Electronic Transactor |
| PF | Packet Filter / Page File |
| PFN | Page Frame Number |
| PGA | Professional Graphics Adapter / Pin Grid Array |
| PGP | Pretty Good Privacy |
| PHP | PHP: Hypertext Preprocessor |
| PI | Programming Interface |
| PIA | Peripheral Interface Adapter |
| PID | Process Identifier / Proportional-Integral-Derivative |
| PIE | Position Independent Executable |
| PIM | Protocol Independent Multicast |
| PIN | Personal Identification Number |
| PIO | Programmed Input/Output |
| PIP | Picture-in-Picture |
| PKCS | Public-Key Cryptography Standards |
| PKI | Public Key Infrastructure |
| PL | Programming Language |
| PLA | Programmable Logic Array |
| PLC | Programmable Logic Controller |
| PLD | Programmable Logic Device |
| PLI | Programming Language I |
| PLL | Phase-Locked Loop |
| PLM | Product Lifecycle Management |
| PL/SQL | Procedural Language/Structured Query Language |
| PLT | Plotter |
| PM | Project Management / Phase Modulation |
| PMA | Physical Medium Attachment |
| PMC | PCI Mezzanine Card |
| PMD | Physical Medium Dependent |
| PMI | Project Management Institute |
| PMM | Peripheral Memory Management |
| PMOS | P-channel Metal-Oxide-Semiconductor |
| PMP | Project Management Professional |
| PMR | Professional Mobile Radio |
| PMS | Property Management System |
| PN | Pseudonoise |
| PNA | Private Network Address |
| PNC | Personal Network Coordinator |
| PND | Portable Navigation Device |
| PNG | Portable Network Graphics |
| PNP | Plug and Play / P-N-P Transistor |
| POI | Point of Interest / Point of Interconnect |
| POL | Policy |
| POM | Page Object Model |
| POP | Post Office Protocol / Point of Presence |
| POPS | Points of Presence |
| PORT | Port |
| POS | Point of Sale |
| POST | Power-On Self-Test |
| POV | Point of View |
| PP | Peer-to-Peer / Parallel Port |
| PPA | Personal Package Archive (Ubuntu) |
| PPC | PowerPC |
| PPE | Parallel Programming Environment |
| PPI | Pixels Per Inch |
| PPL | Peripheral Programming Language |
| PPP | Point-to-Point Protocol |
| PPPoE | Point-to-Point Protocol over Ethernet |
| PPS | Pulses Per Second |
| PPT | PowerPoint |
| PQ | Priority Queue |
| PR | Public Relations / Pull Request |
| PRG | Program |
| PRI | Primary Rate Interface |
| PROM | Programmable Read-Only Memory |
| PRP | Parallel Redundancy Protocol |
| PRS | Primary Reference Source |
| PRT | Printer |
| PS | PostScript / Power Supply |
| PSA | Professional Services Automation |
| PSC | Primary System Controller |
| PSD | Photoshop Document |
| PSE | Power Sourcing Equipment |
| PSH | Push (TCP Flag) |
| PSI | Protocol Specification Interface |
| PSK | Phase Shift Keying |
| PSL | Property Specification Language |
| PSM | Platform Specific Model |
| PSN | Packet Switching Network |
| PSO | Particle Swarm Optimization |
| PSP | PlayStation Portable |
| PSR | Processor Status Register |
| PSS | Packet Switching System |
| PST | Public Switched Telephone (network) |
| PSTN | Public Switched Telephone Network |
| PSU | Power Supply Unit |
| PS/2 | Personal System/2 (Connector standard) |
| PT | Packet Tracer / Physical Therapy |
| PTA | Peripheral Terminal Adapter |
| PTC | Positive Temperature Coefficient |
| PTM | Point-to-Multipoint |
| PTP | Precision Time Protocol / Peer-to-Peer |
| PTR | Pointer |
| PTS | Presentation Time Stamp |
| PU | Processing Unit |
| PVC | Permanent Virtual Circuit |
| PVR | Personal Video Recorder |
| PWM | Pulse Width Modulation |
| PXE | Preboot Execution Environment |
| PXI | PCI Extensions for Instrumentation |
| PZP | Partition Zero-Fill Protection |
| QAM | Quadrature Amplitude Modulation |
| QBE | Query By Example |
| QBR | Quarterly Business Review |
| QC | Quality Control |
| QCS | Quality Control System |
| QED | Quantum Electrodynamics |
| QFP | Quad Flat Package |
| QIC | Quarter-Inch Cartridge |
| QISAM | Queued Indexed Sequential Access Method |
| QLE | Quality Level Evaluation |
| QLI | Query Language Interface |
| QMS | Quality Management System |
| QOS | Quality of Service |
| QOTD | Quote of the Day |
| QP | Query Processor / Quantum Processor |
| QPSK | Quadrature Phase Shift Keying |
| QQL | Query Quality Language |
| QR | Quick Response (Code) |
| QS | Queue System / Quality System |
| QSA | Qualified Security Assessor |
| QSAM | Queued Sequential Access Method |
| QSL | Quality System Library |
| QSM | Quality System Management |
| QSO | Quasi-Stellar Object |
| QT | Qt (Cross-platform software framework) |
| QTE | Quick Time Event |
| QTM | Queue Task Manager |
| QTP | Quick Test Professional |
| QUAD | Quadrant |
| QUIC | Quick UDP Internet Connections |
| QWERTY | QWERTY (Keyboard layout standard) |
| RA | Remote Access / Router Advertisement |
| RADIUS | Remote Authentication Dial-In User Service |
| RAID | Redundant Array of Independent Disks |
| RAM | Random Access Memory |
| RAS | Remote Access Service / Reliability, Availability, Serviceability |
| RARP | Reverse Address Resolution Protocol |
| RAS | Remote Access Server |
| RAT | Remote Access Trojan |
| RBA | Role-Based Access |
| RBAC | Role-Based Access Control |
| RBG | Red, Blue, Green (Color space) |
| RBL | Real-time Blackhole List |
| RDBMS | Relational Database Management System |
| RDP | Remote Desktop Protocol |
| RDT | Reliable Data Transfer |
| RDX | Removable Disk Exchange |
| RE | Regular Expression / Reverse Engineering |
| REST | Representational State Transfer |
| RFC | Request for Comments |
| RFI | Radio Frequency Interference |
| RFID | Radio Frequency Identification |
| RFP | Request for Proposal |
| RFQ | Request for Quotation |
| RGB | Red, Green, Blue |
| RGL | Real-time Graphics Library |
| RGMII | Reduced Gigabit Media Independent Interface |
| RHL | Red Hat Linux |
| RIA | Rich Internet Application |
| RIB | Routing Information Base |
| RID | Relative Identifier |
| RIF | Routing Information Field |
| RIP | Routing Information Protocol |
| RISC | Reduced Instruction Set Computer |
| RJE | Remote Job Entry |
| RLE | Run-Length Encoding |
| RLI | Remote Line Interface |
| RLL | Run-Length Limited |
| RMI | Remote Method Invocation |
| RMS | Root Mean Square / Rights Management Services |
| RO | Read-Only |
| ROC | Receiver Operating Characteristic |
| ROI | Return on Investment |
| ROM | Read-Only Memory |
| RPC | Remote Procedure Call |
| RPM | Revolutions Per Minute / Red Hat Package Manager |
| RR | Resource Record (DNS) |
| RSA | Rivest-Shamir-Adleman (Encryption algorithm) |
| RSC | Remote System Control |
| RSI | Repetitive Strain Injury |
| RSVP | Resource Reservation Protocol |
| RT | Real-Time |
| RTCP | Real-time Transport Control Protocol |
| RTF | Rich Text Format |
| RTL | Register-Transfer Level / Right-to-Left |
| RTO | Recovery Time Objective |
| RTP | Real-time Transport Protocol |
| RTS | Request to Send |
| RTSP | Real Time Streaming Protocol |
| RTT | Round Trip Time |
| RU | Rack Unit |
| RW | Read/Write |
| SA | System Administrator / Service Account |
| SaaS | Software as a Service |
| SAN | Storage Area Network |
| SAP | Systems, Applications, and Products (ERP) |
| SAS | Serial Attached SCSI |
| SATA | Serial Advanced Technology Attachment |
| SAX | Simple API for XML |
| SB | Southbridge / Serial Bus |
| SBC | Single Board Computer |
| SBO | Service-Based Orientation |
| SBS | Small Business Server |
| SC | Smart Card / Supercomputer |
| SCADA | Supervisory Control and Data Acquisition |
| SCB | System Control Block |
| SCC | System Control Center |
| SCE | Service Creation Environment |
| SCI | Scalable Coherent Interface |
| SCM | Source Code Management / Supply Chain Management |
| SCPI | Standard Commands for Programmable Instruments |
| SCR | Silicon Controlled Rectifier |
| SCSI | Small Computer System Interface |
| SCTP | Stream Control Transmission Protocol |
| SD | Secure Digital (Card) / System Design |
| SDC | System Development Cycle |
| SDH | Synchronous Digital Hierarchy |
| SDK | Software Development Kit |
| SDL | Simple DirectMedia Layer |
| SDLC | Software Development Life Cycle |
| SDM | System Development Method |
| SDN | Software-Defined Networking |
| SDP | Session Description Protocol |
| SDR | Software-Defined Radio |
| SDRAM | Synchronous Dynamic RAM |
| SDSL | Symmetric Digital Subscriber Line |
| SDU | Service Data Unit |
| SDV | Software-Defined Vehicle |
| SE | Systems Engineering / Standard Edition |
| SEC | Security |
| SED | Stream Editor |
| SEI | Software Engineering Institute |
| SEM | Search Engine Marketing |
| SEO | Search Engine Optimization |
| SEP | Service Entry Point |
| SER | Serial |
| SES | Service Execution System |
| SET | Secure Electronic Transaction |
| SFTP | SSH File Transfer Protocol |
| SG | Security Group |
| SGA | System Global Area (Oracle) |
| SGML | Standard Generalized Markup Language |
| SGRAM | Synchronous Graphics RAM |
| SHA | Secure Hash Algorithm |
| SHDSL | Single-pair High-speed Digital Subscriber Line |
| SHM | Shared Memory |
| SI | System Integration / International System of Units |
| SIB | System Information Block |
| SIC | Standard Industrial Classification |
| SID | Security Identifier |
| SIM | Subscriber Identity Module |
| SIMD | Single Instruction, Multiple Data |
| SIP | Session Initiation Protocol |
| SIR | Serial Infrared |
| SIRI | Speech Interpretation and Recognition Interface |
| SIS | Security Information System / Student Info System |
| SIT | System Integration Testing |
| SK | Secret Key |
| SKU | Stock Keeping Unit |
| SL | Service Level / Shell |
| SLA | Service Level Agreement |
| SLC | Single-Level Cell (Flash memory) |
| SLI | Scalable Link Interface |
| SLIP | Serial Line Internet Protocol |
| SLM | Service Level Management |
| SLOC | Source Lines of Code |
| SLP | Service Location Protocol |
| SLR | Single-Lens Reflex |
| SLS | Service Level Specification |
| SM | Session Management / Service Manager |
| SMA | SubMiniature version A (Connector) |
| SMB | Server Message Block / Small-Medium Business |
| SMC | System Management Controller |
| SMD | Surface-Mount Device |
| SME | Subject Matter Expert / Small-Medium Enterprise |
| SMF | Single-Mode Fiber |
| SMI | Structure of Management Information |
| SMIL | Synchronized Multimedia Integration Language |
| SML | Standard ML (Language) |
| SMP | Symmetric Multi-Processing |
| SMS | Short Message Service |
| SMTP | Simple Mail Transfer Protocol |
| SMU | System Management Unit |
| SN | Serial Number / Service Node |
| SNA | Systems Network Architecture |
| SNMP | Simple Network Management Protocol |
| SNR | Signal-to-Noise Ratio |
| SOA | Service-Oriented Architecture |
| SOAP | Simple Object Access Protocol |
| SOB | Start of Block |
| SOC | System on a Chip / Security Operations Center |
| SOD | Start of Data |
| SOE | Standard Operating Environment |
| SOF | Start of Frame |
| SOH | Start of Header |
| SOI | Silicon On Insulator |
| SOL | Serial Over LAN |
| SOM | Start of Message / System Object Model |
| SONET | Synchronous Optical Networking |
| SOP | Standard Operating Procedure |
| SOR | System of Record |
| SOS | Silicon On Sapphire |
| SOT | Start of Text |
| SP | Service Provider / Service Pack / Stack Pointer |
| SPA | Single Page Application |
| SPC | Stored Program Control |
| SPD | Serial Presence Detect |
| SPE | Synergistic Processing Element |
| SPF | Sender Policy Framework (Email security) |
| SPI | Serial Peripheral Interface |
| SPK | Speaker |
| SPM | Software Project Management |
| SPP | Standard Parallel Port |
| SPP | Scalable Parallel Processing |
| SPR | Special Purpose Register |
| SPS | Standby Power Supply / Service Provider System |
| SPX | Sequenced Packet Exchange |
| SQ | Sequential |
| SQL | Structured Query Language |
| SR | Status Register / System Requirements |
| SRAM | Static Random Access Memory |
| SRB | System Request Block |
| SRC | Source |
| SRD | Software Requirements Document |
| SRM | System Resource Manager |
| SRM | Security Reference Monitor |
| SRT | Secure Reliable Transport |
| SRV | Service (DNS Record) |
| SS | Spread Spectrum / System Software |
| SSA | Serial Storage Architecture |
| SSB | Single Sideband |
| SSD | Solid State Drive |
| SSE | Streaming SIMD Extensions |
| SSF | Small Form Factor |
| SSI | Small-Scale Integration / Server-Side Includes |
| SSL | Secure Sockets Layer |
| SSO | Single Sign-On |
| SSP | System Support Processor |
| SSR | Solid State Relay |
| SSRP | Simple Server Redundancy Protocol |
| SSS | Static Site Server |
| SST | Spread Spectrum Technology |
| SSTP | Secure Socket Tunneling Protocol |
| SSV | Server-Side Variable |
| ST | Segment Table / Spanning Tree |
| STA | Spanning Tree Algorithm |
| STB | Set-Top Box |
| STD | Standard |
| STI | System Test Interface |
| STM | Synchronous Transfer Mode |
| STP | Spanning Tree Protocol / Shielded Twisted Pair |
| STR | String |
| STT | Secure Transaction Technology |
| STX | Start of Text |
| SUB | Substitute (Character) |
| SUID | Set User ID |
| SV | System Variable |
| SVC | Switched Virtual Circuit |
| SVG | Scalable Vector Graphics |
| SVR4 | System V Release 4 (Unix) |
| SVGA | Super Video Graphics Array |
| SW | Software / Switch |
| SWAP | Swap (Memory space) |
| SWIFT | Society for Worldwide Interbank Financial Telecomm. |
| SWT | Standard Widget Toolkit |
| SYS | System |
| SYSADM | System Administrator |
| SYSGEN | System Generation |
| SYSLOG | System Logging |
| TA | Terminal Adapter |
| TAC | Terminal Access Controller |
| TACACS | Terminal Access Controller Access-Control System |
| TAI | International Atomic Time |
| TAPI | Telephony Application Programming Interface |
| TAR | Tape Archive (File format) |
| TB | Terabyte |
| TBA | To Be Announced |
| TBC | To Be Confirmed |
| TBF | Token Bucket Filter |
| TBI | Traumatic Brain Injury (used in Neuro-tech) |
| TBL | Table |
| TBT | Thunderbolt |
| TC | Transmission Control / Total Cost |
| TCA | Telephone Control Adapter |
| TCAM | Ternary Content-Addressable Memory |
| TCC | Technical Control Center |
| TCD | Traffic Control Device |
| TCE | Test Control Environment |
| TCH | Traffic Channel |
| TCI | Transmission Control Interface |
| TCK | Test Clock (JTAG) |
| TCL | Tool Command Language |
| TCM | Time Compression Multiplexing |
| TCP | Transmission Control Protocol |
| TCP/IP | Transmission Control Protocol / Internet Protocol |
| TCR | Transmission Control Register |
| TCS | Terminal Control System |
| TCT | Test Control Table |
| TCU | Transmission Control Unit / Terminal Control Unit |
| TD | Time Delay / Transmit Data |
| TDA | Transaction Data Architecture |
| TDB | Technical Data Base |
| TDD | Time Division Duplex |
| TDE | Transparent Data Encryption |
| TDI | Transport Driver Interface |
| TDL | Task Description Language |
| TDM | Time Division Multiplexing |
| TDMA | Time Division Multiple Access |
| TDP | Thermal Design Power |
| TDR | Time-Domain Reflectometer |
| TDS | Tabular Data Stream |
| TDT | Terminal Display Table |
| TDX | Trust Domain Extensions (Intel) |
| TE | Terminal Equipment |
| TEA | Tiny Encryption Algorithm |
| TEB | Thread Environment Block |
| TEC | Thermal Electric Cooler |
| TED | Technology, Entertainment, Design |
| TEL | Telephone |
| TELNET | Telecommunication Network |
| TEM | Transmission Electron Microscope |
| TEMP | Temporary |
| TEP | Terminal Entry Point |
| TER | Terminal |
| TEX | TeX (Typesetting system) |
| TF | Transfer Function |
| TFA | Two-Factor Authentication |
| TFC | Traffic Flow Confidentiality |
| TFE | Thin Film Electroluminescence |
| TFH | Thin Film Head |
| TFP | Trivial File Protocol |
| TFS | Team Foundation Server |
| TFT | Thin-Film Transistor |
| TFTP | Trivial File Transfer Protocol |
| TG | Test Group / Timing Generator |
| TGA | Targa (Image format) |
| TGB | Teragigabyte (rare) |
| TGS | Ticket Granting Service (Kerberos) |
| TGT | Ticket Granting Ticket (Kerberos) |
| THD | Total Harmonic Distortion |
| THM | Theme |
| THX | Tomlinson Holman eXperiment |
| TI | Texas Instruments |
| TIA | Telecommunications Industry Association |
| TIC | Test Interface Controller |
| TID | Transaction Identifier / Thread ID |
| TIF | Tagged Image File (TIFF) |
| TIFF | Tagged Image File Format |
| TIM | Timing |
| TIN | Tax Identification Number |
| TIP | Terminal Interface Processor |
| TIS | Technical Information System |
| TK | Toolkit / Telekinesis (Gaming term) |
| TLB | Translation Lookaside Buffer |
| TLD | Top-Level Domain |
| TLS | Transport Layer Security |
| TLV | Type-Length-Value |
| TM | Traffic Management / Transmission Medium |
| TMA | Terminal Management Adapter |
| TMN | Telecommunications Management Network |
| TMP | Temporary |
| TMS | Telemetry System / Test Management System |
| TMT | Technical Management Team |
| TNA | Technical Needs Assessment |
| TNC | Threaded Neill-Concelman (Connector) |
| TNEF | Transport Neutral Encapsulation Format |
| TNS | Transparent Network Substrate |
| TO | Time-Out |
| TOC | Table of Contents |
| TOE | TCP Offload Engine |
| TOG | The Open Group |
| TOI | Time of Issue |
| TOK | Token |
| TOL | Tolerance |
| TOM | Table of Methods |
| TON | Type of Number |
| TOP | Technical and Office Protocols |
| TOR | The Onion Router |
| TOS | Type of Service / Terms of Service |
| TP | Transaction Processing / Twisted Pair |
| TPA | Third-Party Application / Test Point Access |
| TPC | Transaction Processing Performance Council |
| TPD | Technical Product Description |
| TPI | Tracks Per Inch |
| TPL | Template |
| TPM | Trusted Platform Module |
| TPN | Total Packet Number |
| TPP | Third-Party Provider |
| TPR | Throughput Rate |
| TPS | Transactions Per Second |
| TPU | Tensor Processing Unit |
| TR | Token Ring / Transmission Rate |
| TRA | Transmission Adapter |
| TRD | Technical Requirements Document |
| TRI | Tristate |
| TRM | Terminal |
| TRP | Transponder |
| TRS | Transmission System |
| TRT | Transmission Time |
| TS | Terminal Server / Transport Stream |
| TSA | Technical Support Agreement |
| TSAP | Transport Service Access Point |
| TSB | Telecommunication Standardization Bureau |
| TSC | Time Stamp Counter |
| TSD | Technical Specification Document |
| TSE | Terminal Server Edition |
| TSH | Time-Sharing |
| TSI | Time Slot Interchange |
| TSL | Transport Layer |
| TSM | Tivoli Storage Manager |
| TSO | Time Sharing Option |
| TSP | Telephony Service Provider |
| TSR | Terminate and Stay Resident |
| TSS | Time-Sharing System |
| TST | Test |
| TSV | Tab-Separated Values |
| TSW | Technical Switch |
| TT | Teletype / Troubleshooting |
| TTA | Time-Triggered Architecture |
| TTB | Table to Binary |
| TTC | Traffic Control |
| TTF | TrueType Font |
| TTL | Time To Live / Transistor-Transistor Logic |
| TTM | Time To Market |
| TTP | Trusted Third Party |
| TTR | Time To Repair |
| TTS | Text-To-Speech |
| TTT | Time To Trigger |
| TTY | Teletypewriter |
| TU | Time Unit |
| TUI | Text-based User Interface |
| TUL | Temporary User License |
| TV | Television |
| TWAIN | Technology Without An Interesting Name (Scanner) |
| TWC | Traveling Wave Tube |
| TXL | Transformation Language |
| TYP | Typical |
| UA | User Agent |
| UAC | User Account Control |
| UART | Universal Asynchronous Receiver-Transmitter |
| UAV | Unmanned Aerial Vehicle |
| UBA | User Behavior Analytics |
| UCC | Unified Communications and Collaboration |
| UCL | Upper Control Limit |
| UCP | Universal Computer Protocol |
| UDP | User Datagram Protocol |
| UE | User Equipment |
| UEFI | Unified Extensible Firmware Interface |
| UEM | Unified Endpoint Management |
| UFA | Universal File Access |
| UHF | Ultra High Frequency |
| UI | User Interface |
| UID | User Identifier |
| UL | Upload / Underwriters Laboratories |
| ULA | Uncommitted Logic Array |
| ULC | Ultra-Low Cost |
| UML | Unified Modeling Language |
| UMP | Universal Message Protocol |
| UMTS | Universal Mobile Telecommunications System |
| UNC | Universal Naming Convention |
| UNIX | Uniplexed Information and Computing Service |
| UP | Universal Processor |
| UPC | Universal Product Code |
| UPS | Uninterruptible Power Supply |
| URI | Uniform Resource Identifier |
| URL | Uniform Resource Locator |
| URN | Uniform Resource Name |
| USB | Universal Serial Bus |
| USC | Universal Serial Controller |
| USD | Universal Serial Data |
| USIM | Universal Subscriber Identity Module |
| USM | User-based Security Model |
| USPS | Universal Server Power Supply |
| UTC | Coordinated Universal Time |
| UTF | Unicode Transformation Format |
| UTM | Unified Threat Management |
| UTP | Unshielded Twisted Pair |
| UVM | Universal Verification Methodology |
| UX | User Experience |
| VA | Virtual Address |
| VAC | Volts Alternating Current |
| VAN | Value-Added Network |
| VAR | Value-Added Reseller |
| VBS | Visual Basic Script |
| VC | Virtual Circuit / Venture Capital |
| VCA | Voltage Controlled Amplifier |
| VCC | Voltage Common Collector |
| VCD | Video Compact Disc |
| VCI | Virtual Channel Identifier |
| VCL | Visual Component Library |
| VCR | Video Cassette Recorder |
| VDI | Virtual Desktop Infrastructure |
| VDSL | Very-high-bitrate Digital Subscriber Line |
| VEE | Virtual Enterprise Environment |
| VGA | Video Graphics Array |
| VHDL | VHSIC Hardware Description Language |
| VHSIC | Very High Speed Integrated Circuit |
| VI | Visual Interface (Text editor) |
| VID | Vendor ID / Virtual LAN ID |
| VLAN | Virtual Local Area Network |
| VLIW | Very Long Instruction Word |
| VLSI | Very-Large-Scale Integration |
| VM | Virtual Machine |
| VMA | Virtual Memory Address |
| VMC | Virtual Machine Controller |
| VMM | Virtual Machine Monitor |
| VMS | Virtual Memory System |
| VMware | Virtual Machine Software |
| VN | Virtual Network |
| VNC | Virtual Network Computing |
| VOD | Video On Demand |
| VOIP | Voice Over IP |
| VPN | Virtual Private Network |
| VRAM | Video Random Access Memory |
| VRS | Video Relay Service |
| VS | Virtual Server / Versus |
| VSA | Virtual Server Agent |
| VSAM | Virtual Storage Access Method |
| VSC | Virtual Smart Card |
| VSD | Virtual Storage Device |
| VSI | Virtual System Interface |
| VSL | Virtual Storage Library |
| VSM | Virtual Storage Manager |
| VSS | Volume Shadow Copy Service |
| VST | Virtual Studio Technology |
| VSWR | Voltage Standing Wave Ratio |
| VT | Virtual Terminal |
| VTL | Virtual Tape Library |
| VTT | Video Text Tracks |
| VU | Volume Unit |
| W3C | World Wide Web Consortium |
| WAIS | Wide Area Information Server |
| WAL | Write-Ahead Logging |
| WAN | Wide Area Network |
| WAP | Wireless Application Protocol |
| WAR | Web Application Archive (Java) |
| WAV | Waveform Audio File |
| WBEM | Web-Based Enterprise Management |
| WBS | Work Breakdown Structure |
| WC | Word Count |
| WCF | Windows Communication Foundation |
| WDM | Wavelength Division Multiplexing |
| WDP | Wireless Datagram Protocol |
| WDT | Watchdog Timer |
| WEB | World Wide Web |
| WEP | Wired Equivalent Privacy |
| WF | Workflow |
| WFC | Windows Foundation Classes |
| WFS | Web Feature Service |
| WIC | Web Interface Controller |
| WIMP | Windows, Icons, Menus, Pointer |
| WIN | Windows |
| WINS | Windows Internet Name Service |
| WIP | Work In Progress |
| WISP | Wireless Internet Service Provider |
| WLAN | Wireless Local Area Network |
| WLM | Workload Manager |
| WMA | Windows Media Audio |
| WMI | Windows Management Instrumentation |
| WML | Wireless Markup Language |
| WMV | Windows Media Video |
| WORM | Write Once, Read Many |
| WPA | Wi-Fi Protected Access |
| WPA2 | Wi-Fi Protected Access 2 |
| WPAN | Wireless Personal Area Network |
| WPF | Windows Presentation Foundation |
| WPS | Wi-Fi Protected Setup |
| WS | Web Service / Workstation |
| WSDL | Web Services Description Language |
| WSH | Windows Script Host |
| WSN | Wireless Sensor Network |
| WSS | Windows SharePoint Services |
| WSUS | Windows Server Update Services |
| WTLS | Wireless Transport Layer Security |
| WTP | Wireless Transaction Protocol |
| WWW | World Wide Web |
| WYSIWYG | What You See Is What You Get |
| X.25 | Packet-switched data network protocol |
| X.400 | Message Handling System standard |
| X.500 | Directory service protocol |
| X.509 | Digital certificate standard (PKI) |
| XA | Extended Architecture |
| XAML | Extensible Application Markup Language |
| XAP | Exchange Application |
| XBC | X-Bus Controller |
| XDR | External Data Representation |
| XGA | Extended Graphics Array |
| XHTML | Extensible HyperText Markup Language |
| XID | Exchange Identifier |
| XLL | XML Linking Language |
| XML | Extensible Markup Language |
| XMM | Extended Memory Manager |
| XMS | Extended Memory Specification |
| XNS | Xerox Network Systems |
| XOR | Exclusive OR (Logic gate) |
| XPA | X-Protocol Architecture |
| XPI | Cross-Platform Component (Firefox/Mozilla) |
| XPS | XML Paper Specification |
| XSD | XML Schema Definition |
| XSL | Extensible Stylesheet Language |
| XT | Extended Technology (IBM PC/XT) |
| XTS | XEX-based tweaked-codebook mode with ciphertext stealing (Encryption) |
| XV | X-Video |
| Y2K | Year 2000 (Bug) |
| YAC | Yet Another Compiler |
| YAML | YAML Ain't Markup Language |
| YAS | Yet Another System |
| YAW | Yet Another Workstation |
| YCC | YCbCr color model |
| YDI | Your Digital Identity |
| YIQ | YIQ color space (TV broadcast) |
| YPR | Y-Pb-Pr (Analog component video) |
| YUV | YUV color space |
| Z | Zettabyte (10^21 bytes) |
| Z80 | Zilog Z80 (8-bit microprocessor) |
| ZB | Zettabyte |
| ZCAV | Zone Constant Angular Velocity |
| ZCL | Zone Constant Linear Velocity |
| ZDFS | Zero-Day File System |
| ZIF | Zero Insertion Force (Socket) |
| ZIP | Zone Information Protocol / Archive format |
| ZISC | Zero Instruction Set Computer |
| ZM | Zero Memory |
| ZOD | Zero-copy Object Data |
| ZPL | Zircon Programming Language / Zebra Programming Language |
| ZRL | Zero-Run Length |
| ZSH | Z Shell |
| ZTNA | Zero Trust Network Access |
Want to add an acronym or found an error? Open a pull request or an issue!
- Keep alphabetical order
- Use the standard format
By utilizing this repository, you acknowledge that this project is not associated with, sponsored by, or endorsed by any organizations, standards bodies, companies, or individuals who created, maintain, or hold trademarks for the acronyms and terms mentioned. Although attempts are made to ensure the definitions and explanations are accurate and current, this collection does not guarantee the accuracy, completeness, or reliability of the information provided. Technology terminology, acronym meanings, industry standards, and technical definitions evolve continuously and are outside the control of this project. Users reference and apply this information at their own risk and discretion. The author of this repository does not assume responsibility for any issues, damages, or consequences that may arise from relying on any of the definitions or explanations provided, including but not limited to miscommunication in professional settings, incorrect technical implementations, misunderstanding of standards or protocols, project failures, or academic or professional errors. Always verify definitions through official documentation, consult authoritative sources, cross-reference multiple reliable resources, and seek expert guidance when making critical technical decisions based on acronym interpretations.
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This project is licensed under the MIT License.