In order of popularity:
Windows XP
Windows Vista
Mac OS X
Linux
FreeBSD
Solaris
HP-UX
Windows 7
Windows XP,Vista, 7, and Mac Os.
The major function of an operating system is to manage all resources of a system.
Operating systems as a concept aren't criticized by sensible people, as there is simply no viable alternative for what they do.
D.O.S (Disk Operating System)
Windows 7 is an operating system. It does not rely on any other operating system to function.
Yes, Windows 7 is an operating system developed by Microsoft.
how to upgrade an operating system in windows 7
Windows XP was the most popular operating system.
Google has produced two major operating systems.AndroidChrome OS
Yes, it is a PC operating system released by Microsoft in October 2009.
Windows 7 is the name of new Microsoft's operating system.