Related Clues:

• AAA and BBB, e.g.
• Like-minded gps.
• 39-Down et al.
• Charity orgs., maybe
• Sch. yearbook section
• Professional grps.
• Societies: Abbr.
• Mensa and others: Abbr.
• The NBA and NCAA
• Nato and Seato
• A.A. and A.A.A.
• Orgs
• AMA and ADA
• FDA and NFL, e.g
• Clubs: Abbr