A free extension for MICrosoft Windows, released by MICrosoft. Win32s is a software layer on top of Windows whICh allows 32-bit applICations (e.g. MosaIC) to run on Windows. Both stand-alone Windows and {Windows for Workgroups} run as 16 bit, and both can use Win32s to run 32-bit applICations. (1996-07-08)