#8 OS/2

Year created: 1985

Company: IBM

OS/2 is a series of computer operating systems, initially created by Microsoft and IBM, and then later developed by IBM exclusively. It was intended as a protected mode successor of PC DOS. Notably, basic system calls were modeled after MS-DOS calls; their names even started with "Dos" and it was possible to create "Family Mode" applications: text mode applications that could work on both systems.

When Windows 3 became a huge hit, the partnership between Microsoft and IBM was unraveled in 1990. Though no longer supported by IBM, the operating system still runs on many ATMs today.

#7 Desktop Linux

Year created: 1996

Company: Linux desktops are open source.

Desktop Linux, also called Linux on the desktop, refers to specialized Linux distributions with features designed for desktop personal computer users. These features include a graphical user interface and personal use applications

Linux is still around, but hasn't hit the mainstream. Only the truly tech-savvy are die-hard Linux users.

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