Notes

Found an old photo in my archive. On 2018-06-17, I saw a RMV ticket machine at the Oestrich-Winkel railway station, where the upper display failed and showed a Linux terminal (click to view larger version):

As I already said, the upper display normally shows advertisements and upcoming train departures.

Here, the display shows a LXTerminal with several error messages. This leads to the conclusion that these machines use a Linux system with the LXDE desktop environment.