To expand on HarryT
Workgroups started with Win 3 by upgrading to Win3.11 (WFWG)
Win 3.11 even had a driver called Windows for Workgroups For DOS
that allowed a DOS 6 PC to connect (use files and Printers) to a Windows 3.11 host
HP Home limits the 'uses' to 3
XP Pro allows 10
I believe this carries onward
Go Pro