And I'm sure someone else will contribute.

There was Windows 3.1 - which I'm sure you're familiar with. There was a Windows for Workgroups 3.1, but it wasn't promoted much because very soon afterwards there was a Windows for Workgroups 3.11. There was also a Windows 3.11 which just had the networking removed. Neither of the two "... for Workgroups" versions had native TCP/IP.

Wade.