This is a list of notable computer users' groups categorized by interest.
General Chaos Computer Club Computer Measurement Group (CMG) ComputerTown UK Homebrew Computer Club
Hardware platforms Adamcon Coleco Adam user group Toronto PET Users Group (TPUG) SHARE user group for IBM mainframe computers COMMON for Power Systems (IBM i, AS/400, iSeries, System i, AIX and Linux) users in North America. DECUS Digital Equipment Computer Users' Society Macintosh User Group DUsers, the first Macintosh users group, based at Drexel University
Applications IIUG International Informix Users Group Oracle User Group ASUG Americas' SAP Users' Group
Operating systems USENIX established in 1975 as Unix Users Group Linux user group (LUG) Bangalore Linux User Group Beijing GNU/Linux User Group Linux Users' Group of Davis ILUG-Delhi Lanka Linux User Group Linux Australia Linux Users of Victoria LinuxChix Loco team NYLUG Portland Linux/Unix Group RLUG SEUL
Programming languages Z User Group
Markup languages TeX Users Group Deutschsprachige Anwendervereinigung TeX