We got several comps, I'll go in order of OS coolness.
Free BSD web, mail, ftp, nfs, DNS, X servers,
Free BSD firewall.
NT4 server PDC, local fileserver, vpn, backup gateway, mail, dns.
NT4 wksttn my comp; runs mainly 3d apps and nonlin vid editing on G400 dualhead, 2x pII 550e@700/256 ecc (same as our webserver to the letter) and u2w scsi. Tried win2k, but my soft/hard ware is a little old... Didn't run 2k as well as it did nt4 or as well as my roomy's comp runs 2k.
win2k my roomy's comp, celeron 366 @ 405, 128megs ram, non ecc pc100. IDE. voodoo 3. Kick's my comp's ass in win2k... dunno y.
win98se on pent450/voodoo3/128 for games
win98se on Iopener... experimental...