<operating system> Microsoft's first version of Windows NT, released in September 1993, price UKP 395, after having been in beta-test for as long as anyone could remember.
The person responsible for VMS on the DEC VAX [who?] was also responsible for Windows NT. Incrementing each letter in VMS yields WNT.
Try this search on Wikipedia, OneLook, Google
Nearby terms: windows messaging « Windows Millennium Edition « Windows NT « Windows NT 3.1 » Windows NT 3.5 » Windows NT 4 » Windows NT 5