Originally developed by Microsoft for IBM and was the standard operating system for IBM-compatible personal computers.

• MS-DOS

• Windows 1.0 – 2.0

• Windows 3.0 – 3.1

• Windows 95

This was an update to the Windows 98 core and included some features of the Windows 2000 operating system. This version also removed the "boot in DOS" option.

• Windows 98

• Windows 95

• Windows ME - Millennium Edition

• Windows NT 31. - 4.0

It was released in May 1900 offering better icons, performance, and advanced graphics with 16 colors designed for Intel 386 processors. This version is the first release that provides the standard "look and feel" of Microsoft Windows for many years to come.

• Windows 1.0 – 2.0

• MS-DOS

• Windows 95

• Windows 3.0 – 3.1

This window is an operating system for business desktop and laptop systems to run software applications, connect to Internet and intranet sites, and access files, printers, and network resources.

• Windows XP

• Windows 2000

• Windows Vista

• Windows ME

Its most visible feature, though, is the Active Desktop, which integrates the Web browser (Internet Explorer) with the operating system. From the user's point of view, there is no difference between accessing a document residing locally on the user's hard disk or on a Web server halfway around the world.

• Windows 97

• Windows 98

• Windows 99

• Windows 100

Introduced in 1985, this operating system was named due to the computing boxes, or "windows" that represented a fundamental aspect of the operating system.

• Windows 1.0 – 2.0

• MS-DOS

• Windows 95

• Windows 3.0 – 3.1

Debuted on July 29, 2015, Microsoft claims that this operating system features fast start-up and resume, built-in security, and the return of the Start Menu in an expanded form.

• Windows 8

• Windows Vista

• Windows 7

• Windows 10

• Windows Vista

• Windows XP

• Windows 2000

• Windows NT 31. - 4.0

This operating system was released by Microsoft on October 22, 2009, in conjunction with Windows Server 2008 R2, its server counterpart.

• Windows Vista

• Windows 8

• Windows 7

• Windows XP

It was released in August. 1, 2012 and is a completely redesigned operating system that's been developed from the ground up with touchscreen use in mind as well as near-instant-on capabilities

• Windows 8

• Windows 10

• Windows 9

• Windows 7