• [+] Organizations based in the United States by activity (11 C)

A

• [+] Advocacy groups (22 C, 229 P)
• [+] Arbitration organizations (1 C, 20 P)

B

• [+] Boycott organizers (4 P)

C

• [+] Clandestine groups (1 C, 36 P)
• [+] Clubs and societies (49 C, 72 P)
• [+] Companies (26 C, 7 P)
• [+] Conventions (10 C, 23 P)

D

• [+] DIY spaces (2 C, 29 P)
• [+] Deliberative groups (1 C, 11 P)

E

• [+] Educational organizations (32 C, 387 P)

F

• [+] Fire protection organizations (2 P)
• [+] Fraternal and service organizations (20 C, 177 P)
• [+] Front organizations (2 C, 26 P)
• [+] Funding bodies (6 C, 12 P)

H

• [+] Historical reenactment groups (38 P)
• [+] Hunting organizations (5 P)

I

• [+] International friendship associations (7 C, 6 P)

O

• [+] Online organizations (2 C, 3 P)
• [+] Research and development organizations (3 C, 60 P)
• [+] Oversight and watchdog organizations (1 C, 3 P)

P

• [+] Parkour organisations (2 P)

P cont.

• [+] Philanthropic organizations (4 C, 143 P)

R

• [+] Recycling organisations (1 C, 20 P)
• [+] Research organizations (18 C, 57 P)

S

• [+] Support groups (5 C, 57 P)
• [+] Sustainability organisations (1 C, 74 P)

T

• [+] Think tanks (3 C, 34 P)
• [+] Trade unions (10 C, 73 P)

W

• [+] Welfare and service organizations (7 C, 1 P)
• [+] Working groups (1 C, 41 P)