Question : Differences b/w win95,win98,win2k,Windows Me,windows XP

What are the differences between win95,win98,win2k,windows ME,windows XP?.

Answer : Differences b/w win95,win98,win2k,Windows Me,windows XP

It's really just too much to explore in one answer, especially given the vast amount of written material and online resources available:

Try:  http://www.google.co.uk/search?q=history+windows+operating+systems&ie=ISO-8859-1&hl=en&btnG=Google+Search&meta=

http://www.microsoft.com/windows/WinHistoryIntro.mspx

http://members.fortunecity.com/pcmuseum/windows.htm
(Badly written but with ripped off screenshots to copy for your college project :-)

http://www.computerhope.com/os.htm

If you don't know something referenced, the links open a definition from a "glossary"

http://directory.google.com/Top/Computers/History/Operating_Systems/Windows/

The list is endless, but the ones above should explain all you desire to know.