This is an attempt to reduce confusion about the new terms introduced with the release of Windows 8 in various modes, for various architectures and various restrictions.
The evolving set of APIs and runtime available since Windows 3.11 and still changing these days.
Windows NT 64bits is almost compatible with Win32 and Windows CE was partly compatible with Win32 APIs.
The version of Windows NT named 6.2 released at the end of 2012. It runs on x86 and x86(64bits) hardware.
- Windows RT
- WP8 : The version of Windows 8 that runs on phones (short for Windows Phone 8)
- Windows on ARM