Erie Apple Crunchers User Group
- Offers a mailing list, online store, links, and sponsor information.
- http://www.usergroup.org/EAC/

Pennsylvania Apple Microcumputer Users' Group
- Based in University Park. Newsletter, reviews, links, and membership information.
- http://www.pamug.org/

Main Line Macintoch User Group
- Events, shareware, newsletter, and membership information.
- http://www.mlmug.org/

Keystone MacCentral
- Based in Harrisburg, Key Mac offers membership information and application, newsletter, and events calendar.
- http://www.keystonemac.com/

John Hopkins Medical Institute Mac Users Group
- Offers a listserv, links to member web pages, reviews, meeting notes, and e-mail.
- http://www.mug.jhmi.edu/

Bux-Mont Macintosh Users
- Based in Philadelphia, and serving Bucks and Montgomery counties, Bux-Mont offers meeting schedule, tips, mailing list, and software downloads.
- http://www.buxmontmug.org/