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WOW Last modified: Wednesday, May 12, 2004
Short for Win16 on Win32, a collection of programs in Windows NT and later operating systems that allows 16-bit applications to run in a 32-bit Windows environment through a process called thunking. Without WOW, Win32 programs cannot communicate with Win16 programs, though the ability to do so is often necessary with legacy systems or when systems use 16-bit applications with newer 32-bit operating systems. WOW is designed to make the differences between 16-bit and 32-bit applications invisible to the user.
Optimizing NT's WOW Subsystem This 1998 article offers some tips for optimizing NT's WOW subsystem and the applications that use it.	Related Categories Memory Windows Related Terms address space legacy application Microsoft Windows segmented address space thunk