Um Win98, Win98SE, Linux, Win2K, Win2K server and some Solaris 8.
Have DOS 6, Win 3.1, Win95, Win98, Win98SE, Win2K Pro, Win2K Server, Win2K Advanced Server, Solaris 8, Linux (lots starting w/RH5.1), need the rest..................and a couple more years to play with them all..........
Xzaver,
To answer your question, Win2K Server or Linux, depending on what your going to do.
SHUX