We have extensive experience with Dos 3.0 -7.0, Windows 95, 98, 2000, XP home, XP media, and XP Professional, Windows 7 Home and Pro versions local workstation operating systems. We have some experience with Vista Home premium and Vista Business, most of which is bad, it is a resource and memory hog, prerforms slow, and adding a Vista computer can disrupt existing "peer to peer" networks. Printing "peer to peer" to a Vista computer which is connected to the printer offers many problems as well, some Microsoft is apparently unable or unwilling to resolve. We do not Reccomend Vista or Windows 8 to our clients. We have some experience with Mac Os 5.0-9.0 Operating systems and integrating them into windows networks, but we are not really a Mac Shop.