\begin{frame}{Ken Thompson}
  \begin{center}
  \includegraphics[height=35mm]{images/Thompson-Ritchie2.jpg}
  \end{center}
  
  Matching algorithm has been developed by \emph{Ken Thompson}.
  \bigskip
  
  Won the \alert{Turing award} in 1983 together with \emph{Dennis Ritchie} 
  for the operating system \alert{Unix}.
  %   Ken Thompson (geb.\ 1943) ontwikkelde ook
  %   een database voor \alert{schaakeindspelen} met max.\ zes stukken.
  Dennis Ritchie (1941-2011) has also invented the programming language \alert{C}.
  
\end{frame}