My main box is running Win2k Pro, WinXp (never use) and Red Hat 7.2. I have a P3 system that is my go ahead and break it box. It has Win2k server, Xp and RH 7.2.

The only Macintosh that I have ever owned is an old powerbook 5300 that I pieced toghether out of parts and it's currently running 7.5.2 (ugh).

If pda's count than WInCE 3.0 on my ipaq 3600.