\documentclass[pdf]{beamer}
\usepackage[utf8]{inputenc}
\usepackage[english,vietnamese]{babel}
\usepackage{graphicx}
\usepackage{pgf-pie}
\mode<presentation>{}
\title{Free Software Movement}
\subtitle{Reclaim Our Control}
\author{Nguyễn Gia Phong---BI9-184}
\date{\selectlanguage{english}\today}
\begin{document}
\begin{frame}
  \pause
  \includegraphics[width=0.27\textwidth]{Windows.png}
  \pause\hfill
  \includegraphics[width=0.26\textwidth]{Android.png}
  \pause\hfill
  \includegraphics[width=0.28\textwidth]{iOS.png}
\end{frame}

\begin{frame}
  \titlepage
\end{frame}

\begin{frame}{Content}
  \Large
  \begin{enumerate}
    \item Definitions
    \item Problem
    \item Success
    \item Invitation
  \end{enumerate}
\end{frame}

\begin{frame}{What Is Software?}
  \includegraphics[width=\textwidth]{software-def.png}
\end{frame}

\begin{frame}{4 Essential Freedoms}
  \pause\hfill
  \includegraphics[width=0.4\textwidth]{freedom-0.png}
  \pause\hfill
  \includegraphics[width=0.4\textwidth]{freedom-1.png}
  \hfill

  \pause\hfill
  \includegraphics[width=0.4\textwidth]{freedom-2.png}
  \pause\hfill
  \includegraphics[width=0.4\textwidth]{freedom-3.png}
  \hfill
\end{frame}

\begin{frame}{Without Freedom, Users Are Controlled by Programs}
  \includegraphics[width=\textwidth]{prog-ctrl-users.png}
\end{frame}

\begin{frame}
  \includegraphics[width=\textwidth]{updateandrestart.png}
  % https://www.informationweek.com/microsoft-updates-windows-without-user-permission-apologizes/d/d-id/1059183
  % https://www.forbes.com/sites/gordonkelly/2015/07/17/windows-10-forced-automatic-updates/
\end{frame}

\begin{frame}{Location History Tracking}
  \center\includegraphics[width=0.5\textwidth]{google-map.png}
  % https://www.theguardian.com/technology/2018/aug/13/google-location-tracking-android-iphone-mobile
\end{frame}

\begin{frame}{Amazon Kindle}
  \center\includegraphics[width=0.9\textwidth]{kindle.jpg}
  % https://pogue.blogs.nytimes.com/2009/07/17/some-e-books-are-more-equal-than-others/
\end{frame}

\begin{frame}{The Jail of iOS}
  \includegraphics[width=\textwidth]{iOS-jail.jpg}
  % https://weblog.rogueamoeba.com/2008/03/07/code-signing-and-you/
\end{frame}

\begin{frame}{Successful Free Software}
  \center
  \includegraphics[width=0.23\textwidth]{Tux.png}
  \includegraphics[width=0.23\textwidth]{Firefox.png}
  \includegraphics[width=0.23\textwidth]{Libre-Office.png}
  \includegraphics[width=0.21\textwidth]{VLC.png}

  \includegraphics[width=0.21\textwidth]{Scratch.png}
  \includegraphics[width=0.24\textwidth]{Gimp.png}
  \includegraphics[width=0.5\textwidth]{moodle.png}
\end{frame}

\begin{frame}{MATLAB vs. Matplotlib \& SciPy}
  \hfill
  \includegraphics[width=0.4\textwidth]{matlab.png}
  \hfill
  \includegraphics[width=0.4\textwidth]{matplotlib.png}
  \hfill
\end{frame}

\begin{frame}{Blender: Becoming Industrial Standard}
  \includegraphics[width=\textwidth]{big-buck-bunny.jpg}
\end{frame}

\begin{frame}{Operating System Market Share}
  \begin{tikzpicture}
    \pie[cloud]{88/Windows, 10/macOS, 2/GNU+Linux}
  \end{tikzpicture}
\end{frame}

\begin{frame}{Schools Still Teach Non-Free Software}
  \includegraphics[width=\textwidth]{ms-office.jpg}
\end{frame}

\begin{frame}{Governments Still Make Proprietary Software Mandatory}
  \includegraphics[width=\textwidth]{htkk-2014.jpg}
\end{frame}

\begin{frame}{Join Us!}
  \includegraphics[width=\textwidth]{pureos8-gnome3.jpg}
\end{frame}

\begin{frame}{You Can Help!}
  \hfill
  \includegraphics[width=0.4\textwidth]{Octocat.png}
  \hfill\pause
  \includegraphics[width=0.5\textwidth]{GSoC.png}
\end{frame}

\begin{frame}{Conclusion}
  \includegraphics[width=\textwidth]{conclude.png}
\end{frame}
\end{document}