\begin{frame}
\frametitle{Geschichte}
\tableofcontents[hideothersubsections]
-\end{frame}
\ No newline at end of file
+\end{frame}
+
+\input{history/linux}
+\input{history/hurd}
+\input{history/freebsd}
+\input{history/minix}
\ No newline at end of file