i think that windows 95 is obsolite i actually think all 3 of them are, but 95 more than the others... windows me on the other hand, hardly was a stable OS and it never really got used and only a very small amount of computers have ME, i dont think and companies use it either...
also i know that some componies still use windows 98, which is stable but is not nearly as good as windows 2000 (pro included) for companies and stuff.
best bet is windows xp and pro, most companies are changing to it now, as is most home users, because it is just easier, and of course, it comes with all the new computers.