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Line 1: {{about\|the Win16 subsystem in 32-bit Windows NT\|the 32-bit compatibility layer in 64-bit Windows\|WOW64}} '''Windows on Windows''', commonly referred to as '''WOW''' or '''WoW''', is a critical component for [[backward compatibility]] of [[legacy code]] in [[Windows NT]]-based operating systems. WoW supports applications using the [[Windows API\|Win16]] [[API]] and relies on [[Virtual DOS machine\|NTVDM]] (NT Virtual DOS machine). Win16 applications run as-is without preemptive multitasking or [[long filename]] support. These programs do not take advantage of the 32-bit version of Windows NT.

Windows on Windows: Difference between revisions