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WINDOWS1X
The project was briefly codenamed "Interface Manager" before the windowing system was developed - contrary to popular belief that it was the original name for Windows and Rowland Hanson, Windows 1.0 was not a complete operating system, but rather an "operating environment" that extended MS-DOS, and shared the latter's inherent flaws and errors. -
WINDOWS2.X
This is as a "run-time version" with Microsoft's new graphical applications, excel and word of windows. They could be run from MS-DOS, executing Windows for the duration of their activity, and closing down Windows upon exit. -
WINDOWS 3.0
It allowed users to better multi task older MS-DOS based software compared to Windows/386, thanks to the introduction of virtual memory. . PCs had improved graphics by this time, due to VGA video cards. -
WINDOWS NT 3.X
The main architect of the system was Dave Cutler. Cutler had been developing a follow-on to VMS at DEC called Mica.DEC also believed he brought Mica's code to Microsoft and sued. Microsoft eventually paid US$150 million and agreed to support DEC's Alpha CPU chip in NT. -
WINDOWS 95
Microsoft began to develop a new consumer oriented version of the operating system codenamed Chicago. Can Support a 32-bit preemptive multitasking like OS/2 and Windows NT, although a 16-bit kernel would remain for the sake of backward compatibility -
WINDOWS 98
Codename "Memphis". Includes new hardware drivers and the FAT23 file system which supports disk partitions that are larger than 2 GB (first introduced in Windows 95 OSR2). -
WINDOWS 2000
One of it's most significant features is the Active Directory, a near-complete replacement of the NT 4.0 Window Server Domain model, which built on industry-standard technologies like DNS, LDAP, and Kerberos to connect machines to one another -
WINDOWS SERVER 2008
Codename "Longhorn". Windows Server 2008 builds on the technological and security advances first introduced with Windows Vista, and is significantly more modular than its predecessor, Windows Server 2003 -
WINDOWS 7 SERVER 2008
It was previously known by the codenames Blackcomb and Vienna. Windows 7 has the version number NT 6.1. Since its release, Windows 7 has had one service pack. Some features of Windows 7 are faster booting, Device Stage, Windows Powershell, less obtrusive User Account Control, multi-touch, and improved window management. -
WINDOWS 8 AND SERVER 2012
Windows 8 features a redesigned user interface, designed to make it easier for touchscreen users to use Windows. The interface introduced an updated Start menu known as the Start screen, and a new full-screen application platform. The desktop interface is also present for running windowed applications, although Windows RT will not run any desktop applications not included in the system. -
WINDOWS 10 SERVER 2016
Codenamed Threshold (Later Redstone). A number of new features like Cortana, the Microsoft Edge web browser, the ability to view Windows Store apps as a window instead of full screen, virtual desktops, revamped core apps, Continuum, and a unified Settings app were all features debuted in Windows 10. Microsoft has announced that Windows 10 will be the last major version of its series of operating systems to be released.
