orientation on the paper, as shown in Fig.~\ref{fig:laserpointer}. The accuracy
for these tests was 1~degree.
-After the initial setup, the application \cmd{roomba\_tests} (see
+After the initial setup, the application \prog{roomba\_tests} (see
section~\ref{sec:impl:measuring}) was started on the netbook for half-automatic
testing. It used a predefined array of nominal distances, angles and velocities
and for each pair of distance (for straight drive tests) or angle (for turn