When I arrived at CERN back in 2003, there was a pile of Sun workstations on a corner from my office, waiting to be dispatched to computer heaven.
Most folks were either using the new OS X, or Windows, with a custom Linux distribution on the servers, eventually replaced by Scientic Linux distribution.
There were still some Sun stations kind of serving the X Windows sessions on the restaurant area, and even those didn´t last much longer.