Windows NT 4.0

Windows NT 4.0 (codenamed Cairo) is the successor to Windows NT 3.51 and the first version of Windows NT to feature the Windows Explorer interface introduced in Windows 95. It is the last version of Windows NT to include NT in its product name.

The Windows Desktop Update further enhances the shell by incorporating features from Windows 98.

Editions
There are several editions of Windows NT 4:

Service Packs
There were 6 service packs released for Windows NT 4. There was a 7th Service Pack Planned, but it was canceled and Update Rollup 6a was released instead.