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Windows on Windows

This is an old revision of this page, as edited by Josh the Nerd (talk | contribs) at 17:05, 22 October 2007 (We don't need 2 articles about WOW64). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.
This article is about the Win16 subsystem in 32-bit Windows NT. For the 32-bit compatability layer in 64-bit Windows, see WOW64.

Windows on Windows, commonly referred to as WOW or WoW, is a critical component for backward compatibility of legacy code in Windows NT. WoW supports applications using the Win16 API and relies on NTVDM.

64-bit versions of Windows do not include the 16-bit WoW subsystem or NTVDM and can therefore cannot run 16-bit Windows or DOS applications.

 

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