Organizations

Professional Organizations

• Technology Association of Georgia
• Atlanta Venture Forum
• First Tuesday Atlanta (long since dead... historical artifact here!)
• Business & Technology Alliance (now subsumed into TAG)

Political Groups

• Georgia Libertarian Party
  
• Space Access Society
• Space Frontiers Foundation
• Society for the Separation of School and State
• Free State Project

Social Groups

• MENSA(but I haven't been to meetings in years)
• DragonCon

Other

• The X-Prize Foundation
• Atlanta Macintosh Users Group

And more to come, as I remember them...