The Free On-line Dictionary of Computing (30 December 2018):

Windows for Workgroups
WFW
WFWG

    (WFW, WFWG) A version of Windows 3.1 that
   worked with a network.  Although stand-alone 3.1 could be
   networked, the installation and configuration was much
   improved with Windows for Workgroups.  The first release was
   Windows for Workgroups 3.1.

   (1996-07-08)