| AAU | Amateur Athletic Union (skr.) |
|---|---|
| ACU | Asian Clearing Union (skr.) |
| ARU | Australian Rugby Union (skr.) |
| ASU | American Students Union (skr.) |
| BTU | British Trade Union (skr.) |
| DU | Deutsche Union (skr.) |
| EJU | European Jewish Union (skr.) |
| ERU | English Rugby Union (skr.) |
| IBU | International Biathlon Union (skr.) |
| IBU | International Boxing Union (skr.) |