<P> Intergraph Corporation ported Windows NT to its Clipper architecture and later announced intention to port Windows NT 3.51 to Sun Microsystems' SPARC architecture, but neither version was sold to the public as a retail product . </P> <P> Only two of the Windows NT 4.0 variants (IA - 32 and Alpha) have a full set of service packs available . All of the other ports done by third parties (Motorola, Intergraph, etc .) have few, if any, publicly available updates . </P> <P> Windows NT 4.0 was the last major release to support Alpha, MIPS, or PowerPC, though development of Windows 2000 for Alpha continued until August 1999, when Compaq stopped support for Windows NT on that architecture; and then three days later Microsoft also canceled their AlphaNT program, even though the Alpha NT 5 (Windows 2000) release had reached RC 2 (build 2128). </P> <P> Microsoft announced on 5 January 2011 that the next major version of the Windows NT family will include support for the ARM architecture . Microsoft demonstrated a preliminary version of Windows (version 6.2. 7867) running on an ARM - based computer at the 2011 Consumer Electronics Show . This eventually led to the commercial release of the Windows 8 - derived Windows RT on October 26, 2012, and the implementation of NT over CE on Windows Phone 8 . </P>

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