users' group
type of club focused on the use of a particular technology
Berkeley Macintosh Users Group
Macintosh User Group
Free Software Users Group
groups supporting all free software and not a specific operative system
Danish UNIX User Group
Computer user group around UNIX systems
Linux user group
kind of association of users of the Linux kernel (and usually associated operating system software)
Small Wiki Monitoring Team
group of Wikimedians who monitor small wikis for global patrol
Digital Equipment Computer Users Society
independent computer user group related to Digital Equipment Corporation
SHARE
user group for IBM mainframe computing
GUST
TeX User Group Poland