diff --git a/02-repo-structure.tex b/02-repo-structure.tex
new file mode 100644
index 0000000..01c3b70
--- /dev/null
+++ b/02-repo-structure.tex
@@ -0,0 +1,80 @@
+\documentclass{beamer}
+
+% Theme choice
+\usetheme{Madrid}
+
+% Optional packages
+\usepackage{graphicx} % For including images
+\usepackage{amsmath}  % For math symbols and formulas
+\usepackage{hyperref} % For hyperlinks
+\usepackage{listings}
+\usepackage{xcolor}
+\usepackage[T1]{fontenc}
+
+\lstdefinestyle{CStyle}{
+  language=C,                    % Set the language to C
+  basicstyle=\ttfamily\footnotesize\linespread{0.9}\tiny, % Set font style and size
+  keywordstyle=\color{blue},      % Color of keywords
+  commentstyle=\color{gray},      % Color of comments
+  stringstyle=\color{red},        % Color of strings
+  showstringspaces=false,         % Do not mark spaces in strings
+  breaklines=true,                % Enable line breaks at appropriate places
+  breakatwhitespace=false,        % Break lines at any character, not just whitespace
+  numbers=left,                   % Show line numbers on the left
+  numberstyle=\tiny\color{gray},  % Style for line numbers
+  tabsize=4,                      % Set tab width
+  keepspaces=true,                % Keep indentation spaces
+  frame=single,                   % Add a border around the code
+  aboveskip=0pt,                  % Reduce space above the code block
+  belowskip=0pt,                   % Reduce space below the code block
+  xleftmargin=7.5pt,                      % Add left padding (approx. 2.8mm or 10px)
+  xrightmargin=15pt,                      % Add left padding (approx. 2.8mm or 10px)
+}
+
+% Title, author, date, and institute (optional)
+\title[Parallel Programming. Repository structure]{Parallel Programming course. Repository structure}
+\author{Obolenskiy Arseniy, Nesterov Alexander}
+\institute{Nizhny Novgorod State University}
+
+\date{\today} % or \date{Month Day, Year}
+
+% Redefine the footline to display both the short title and the university name
+\setbeamertemplate{footline}{
+  \leavevmode%
+  \hbox{%
+    \begin{beamercolorbox}[wd=.45\paperwidth,ht=2.5ex,dp=1ex,leftskip=1em,center]{author in head/foot}%
+        \usebeamerfont{author in head/foot}\insertshortinstitute % Displays the university name
+    \end{beamercolorbox}%
+    \begin{beamercolorbox}[wd=.45\paperwidth,ht=2.5ex,dp=1ex,leftskip=1em,center]{author in head/foot}%
+      \usebeamerfont{author in head/foot}\insertshorttitle % Displays the short title
+    \end{beamercolorbox}%
+    \begin{beamercolorbox}[wd=.1\paperwidth,ht=2.5ex,dp=1ex,rightskip=1em,center]{author in head/foot}%
+      \usebeamerfont{author in head/foot}\insertframenumber{} / \inserttotalframenumber
+    \end{beamercolorbox}}%
+  \vskip0pt%
+}
+
+\begin{document}
+
+\begin{frame}
+    \titlepage
+\end{frame}
+
+\begin{frame}{Contents}
+    \tableofcontents
+\end{frame}
+
+\section{Introduction}
+
+\begin{frame}{Slide}
+\end{frame}
+
+\begin{frame}
+    \centering
+    \Huge{Thank You!}
+\end{frame}
+
+\begin{frame}{References}
+\end{frame}
+
+\end{document}
diff --git a/02-repo-structure.toc b/02-repo-structure.toc
new file mode 100644
index 0000000..1abbe55
--- /dev/null
+++ b/02-repo-structure.toc
@@ -0,0 +1 @@
+\beamer@sectionintoc {1}{Introduction}{3}{0}{1}
diff --git a/03-mpi-api.tex b/03-mpi-api.tex
new file mode 100644
index 0000000..9c30516
--- /dev/null
+++ b/03-mpi-api.tex
@@ -0,0 +1,98 @@
+\documentclass{beamer}
+
+% Theme choice
+\usetheme{Madrid}
+
+% Optional packages
+\usepackage{graphicx} % For including images
+\usepackage{amsmath}  % For math symbols and formulas
+\usepackage{hyperref} % For hyperlinks
+\usepackage{listings}
+\usepackage{xcolor}
+\usepackage[T1]{fontenc}
+
+\lstdefinestyle{CStyle}{
+  language=C,                    % Set the language to C
+  basicstyle=\ttfamily\footnotesize\linespread{0.9}\tiny, % Set font style and size
+  keywordstyle=\color{blue},      % Color of keywords
+  commentstyle=\color{gray},      % Color of comments
+  stringstyle=\color{red},        % Color of strings
+  showstringspaces=false,         % Do not mark spaces in strings
+  breaklines=true,                % Enable line breaks at appropriate places
+  breakatwhitespace=false,        % Break lines at any character, not just whitespace
+  numbers=left,                   % Show line numbers on the left
+  numberstyle=\tiny\color{gray},  % Style for line numbers
+  tabsize=4,                      % Set tab width
+  keepspaces=true,                % Keep indentation spaces
+  frame=single,                   % Add a border around the code
+  aboveskip=0pt,                  % Reduce space above the code block
+  belowskip=0pt,                   % Reduce space below the code block
+  xleftmargin=7.5pt,                      % Add left padding (approx. 2.8mm or 10px)
+  xrightmargin=15pt,                      % Add left padding (approx. 2.8mm or 10px)
+}
+
+% Title, author, date, and institute (optional)
+\title[Parallel Programming. MPI (deatiled API overview)]{Parallel Programming course. MPI (deatiled API overview)}
+\author{Obolenskiy Arseniy, Nesterov Alexander}
+\institute{Nizhny Novgorod State University}
+
+\date{\today} % or \date{Month Day, Year}
+
+% Redefine the footline to display both the short title and the university name
+\setbeamertemplate{footline}{
+  \leavevmode%
+  \hbox{%
+    \begin{beamercolorbox}[wd=.45\paperwidth,ht=2.5ex,dp=1ex,leftskip=1em,center]{author in head/foot}%
+        \usebeamerfont{author in head/foot}\insertshortinstitute % Displays the university name
+    \end{beamercolorbox}%
+    \begin{beamercolorbox}[wd=.45\paperwidth,ht=2.5ex,dp=1ex,leftskip=1em,center]{author in head/foot}%
+      \usebeamerfont{author in head/foot}\insertshorttitle % Displays the short title
+    \end{beamercolorbox}%
+    \begin{beamercolorbox}[wd=.1\paperwidth,ht=2.5ex,dp=1ex,rightskip=1em,center]{author in head/foot}%
+      \usebeamerfont{author in head/foot}\insertframenumber{} / \inserttotalframenumber
+    \end{beamercolorbox}}%
+  \vskip0pt%
+}
+
+\begin{document}
+
+\begin{frame}
+    \titlepage
+\end{frame}
+
+\begin{frame}{Contents}
+    \tableofcontents
+\end{frame}
+
+\section{MPI collective operations}
+
+\begin{frame}{Collective operations}
+\end{frame}
+
+\begin{frame}{Broadcast}
+\end{frame}
+
+\begin{frame}{\texttt{MPI\_Gather}}
+\end{frame}
+
+\begin{frame}{\texttt{MPI\_Scatter}}
+\end{frame}
+
+\begin{frame}{\texttt{MPI\_AllGather}}
+\end{frame}
+
+\begin{frame}{All-to-All}
+\end{frame}
+
+\begin{frame}{Reduction}
+\end{frame}
+
+\begin{frame}
+    \centering
+    \Huge{Thank You!}
+\end{frame}
+
+\begin{frame}{References}
+\end{frame}
+
+\end{document}
diff --git a/03-mpi-api.toc b/03-mpi-api.toc
new file mode 100644
index 0000000..c012bb9
--- /dev/null
+++ b/03-mpi-api.toc
@@ -0,0 +1 @@
+\beamer@sectionintoc {1}{MPI collective operations}{3}{0}{1}
diff --git a/04-parallelism-theory.tex b/04-parallelism-theory.tex
new file mode 100644
index 0000000..20050d3
--- /dev/null
+++ b/04-parallelism-theory.tex
@@ -0,0 +1,83 @@
+\documentclass{beamer}
+
+% Theme choice
+\usetheme{Madrid}
+
+% Optional packages
+\usepackage{graphicx} % For including images
+\usepackage{amsmath}  % For math symbols and formulas
+\usepackage{hyperref} % For hyperlinks
+\usepackage{listings}
+\usepackage{xcolor}
+\usepackage[T1]{fontenc}
+
+\lstdefinestyle{CStyle}{
+  language=C,                    % Set the language to C
+  basicstyle=\ttfamily\footnotesize\linespread{0.9}\tiny, % Set font style and size
+  keywordstyle=\color{blue},      % Color of keywords
+  commentstyle=\color{gray},      % Color of comments
+  stringstyle=\color{red},        % Color of strings
+  showstringspaces=false,         % Do not mark spaces in strings
+  breaklines=true,                % Enable line breaks at appropriate places
+  breakatwhitespace=false,        % Break lines at any character, not just whitespace
+  numbers=left,                   % Show line numbers on the left
+  numberstyle=\tiny\color{gray},  % Style for line numbers
+  tabsize=4,                      % Set tab width
+  keepspaces=true,                % Keep indentation spaces
+  frame=single,                   % Add a border around the code
+  aboveskip=0pt,                  % Reduce space above the code block
+  belowskip=0pt,                   % Reduce space below the code block
+  xleftmargin=7.5pt,                      % Add left padding (approx. 2.8mm or 10px)
+  xrightmargin=15pt,                      % Add left padding (approx. 2.8mm or 10px)
+}
+
+% Title, author, date, and institute (optional)
+\title[Parallel Programming. Parallelism theory]{Parallel Programming course. Parallelism theory}
+\author{Obolenskiy Arseniy, Nesterov Alexander}
+\institute{Nizhny Novgorod State University}
+
+\date{\today} % or \date{Month Day, Year}
+
+% Redefine the footline to display both the short title and the university name
+\setbeamertemplate{footline}{
+  \leavevmode%
+  \hbox{%
+    \begin{beamercolorbox}[wd=.45\paperwidth,ht=2.5ex,dp=1ex,leftskip=1em,center]{author in head/foot}%
+        \usebeamerfont{author in head/foot}\insertshortinstitute % Displays the university name
+    \end{beamercolorbox}%
+    \begin{beamercolorbox}[wd=.45\paperwidth,ht=2.5ex,dp=1ex,leftskip=1em,center]{author in head/foot}%
+      \usebeamerfont{author in head/foot}\insertshorttitle % Displays the short title
+    \end{beamercolorbox}%
+    \begin{beamercolorbox}[wd=.1\paperwidth,ht=2.5ex,dp=1ex,rightskip=1em,center]{author in head/foot}%
+      \usebeamerfont{author in head/foot}\insertframenumber{} / \inserttotalframenumber
+    \end{beamercolorbox}}%
+  \vskip0pt%
+}
+
+\begin{document}
+
+\begin{frame}
+    \titlepage
+\end{frame}
+
+\begin{frame}{Contents}
+    \tableofcontents
+\end{frame}
+
+\section{Parallelism efficiency}
+
+\begin{frame}{Parallelism metrics}
+\end{frame}
+
+\begin{frame}{Amdahl's law}
+\end{frame}
+
+\begin{frame}
+    \centering
+    \Huge{Thank You!}
+\end{frame}
+
+\begin{frame}{References}
+\end{frame}
+
+\end{document}
diff --git a/04-parallelism-theory.toc b/04-parallelism-theory.toc
new file mode 100644
index 0000000..bcaa5ff
--- /dev/null
+++ b/04-parallelism-theory.toc
@@ -0,0 +1 @@
+\beamer@sectionintoc {1}{Parallelism efficiency}{3}{0}{1}