| AACO | American Association of Certified Orthoptists |
|---|---|
| ATC | Athletic Trainer Certified |
| CEM | Certified Energy Manager (skr.) |
| SID | System Identifier (skr.) |
| UBO | Unidentified Bright Object (skr.) |
| UFO | Unidentified Flying Object(skr.) |
| UMA | Unidentified Mysterious Animal |