1.Windows series operating system
Produced by Microsoft Corp;
2.Unix class operating system
Such as SOLARIS BSD series (FREEBSD OpenBSD NetBSD pcbsd);
3.Linux class operating system
Such as UBUNTU SUSE Linux Fedora etc.
4.Mac operating system
Produced by the Apple Corp (Darwin) generally installed on MAC computers.

Mainframe computer
The first is the operating system for the development of large main structure in 1960s due to the system in terms of software has made huge investment