Greater Seattle Linux Users Group
Area Covered: Seattle, Washington
http://www.gslug.org

OpenSolaris User Group
Area Covered: Seattle, Washington
http://opensolaris.org/os/community/os_user_groups/seosug

Oracle Windows NT User Group
Area Covered: California
http://www.geocities.com/SiliconValley/Heights/6616

Salem Java Users Group
Area Covered: Salem, Oregon
https://sjug.dev.java.net

Seattle Unix Group
Area Covered: Seattle, Washington
http://www.seaslug.org