Windows NT
新技術視窗操作系統（Windows NT），是美國微軟公司1991年推出的操作系統。
Windows NT是基於OS/2 NT的基礎編制的。OS/2是由微軟和IBM聯合研製，分為微軟的Microsoft OS/2 NT與IBM的IBM OS/2。協作後來不歡而散，IBM繼續向市場提供先前的OS/2版本，而微軟則把自己的OS/2 NT的名稱改為Windows NT，即第一代的Windows NT 3.1。Windows NT是純32位操作系統，採用先進的NT核心技術。NT即新技術(New Technology)。
微軟公司從數字設備公司（Digital Equipment Corporation）僱傭了一批人員來開發這個新系統。這個系統的很多元素反映了早期的帶有VMS和RSX-11的DEC概念。
Windows NT獲得了比OS/2更大的成功，因為它那永遠不能完全了解的特性和微軟的市場威力。
下面是微軟發布的Windows NT的主要版本：
- Microsoft Windows NT 3.1
- Microsoft Windows NT 3.5
- Microsoft Windows NT 3.51
- Microsoft Windows NT 4.0
從5.0版開始，Windows NT只是簡單地稱為Windows了，下面的版本是後來的版本：
- Microsoft Windows 2000 (Windows NT 5.0)
- Microsoft Windows XP (Windows NT 5.1)
- Microsoft Windows Server 2003 (Windows NT 5.2)
除此之外，下面是未來的版本：
- Microsoft Windows Vista (6.0)
NT意思
NT除了跟上文一樣的解釋New Technology之外，有另一個版本指NT是來自於微軟在i860上開發NT時所使用模擬器N10(Ten)
轉自Bink.nu： During a trip to Microsoft's Redmond campus this week, I had the opportunity to meet with Mark Lucovsky, one of the original architects of NT. We had a long discussion about the development and evolution of NT, but one of the more fascinating tidbits he revealed was that NT does not, in fact, stand for "New Technology," as documented in books such as "Showstoppers" and "Inside Windows NT." Instead, the name comes from the earliest days of the product's development, when it was targeted at the Intel i860, a RISC processor. In those days, Intel's chip was behind schedule, so Microsoft had to use an i860 emulator called the N10. NT was so named because it worked on the "N-Ten." I'll have much more information from my meetings with Lucovsky and others involved with Windows Server in the days ahead.
