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