Department of Control Engineering, Faculty of Electrical Engineering, Czech Technical University, Czech Republic
Debian is used on 20 diskless workstations for education of the subject Computer Systems (mainly for use in control applications) X35POS. The subject has already been taught on Linux for four years. We use Unionfs and Ingo Molnar's realtime patches to allow control application development now. There are two other labs in our department which allows dualboot to Debian (about 20 more systems). More Linux (Debian, Gentoo, Slackware, etc..) based systems (servers and desktops) are used by department staff and to drive other projects.
Debian has the advantage of a very broad package repository and seamless maintenance. It does not enforce complicated configuration tools and allows adaptation to our specific needs.