diff --git a/programming/lecture/programming-chapter.tex b/programming/lecture/programming-chapter.tex
index 3c29691..6d3ed40 100644
--- a/programming/lecture/programming-chapter.tex
+++ b/programming/lecture/programming-chapter.tex
@@ -28,7 +28,11 @@
 \item Random-walk behutsam mit einer Schleife, dann zwei Schleifen. Plus Bildchen.
 \item Random-Walk with drift is model for decision making! See resoures/GoldShadlen2007 paper, Figure 2. Das wird auch in Systems Neurosciene \texttt{9 - Kognitive Kontrolle II.pdf} behandelt.
 \item Doppelte for-Schleife
-\item File output and input (load, save, fprintf, scanf) (extra chapter?)
+\item File handling: (extra chapter?)
+  \begin{itemize}
+  \item output and input (load, save, fprintf, scanf)
+  \item dir() function
+  \end{itemize}
 \item help() und doc()
 \item A box about sampling of contiunous data.
 \item A box about foo and bar?