| Acronym | Meaning |
| A4 | Many |
| TCU | Texas Christian University |
| BMCC | Borough Of Manhattan Community College |
| TACC | Tactical Air Control Centre - (USAF) Tanker Airlift Control Center |
| OPI | Office Of Primary Interest - Open Prepress Interface |
| KOR | Republic Of Korea (ISO 3166 Trigram) |
| MAS | NATO Military Agency For Standardisation |
| CJD | Chronological Julian Day - Creutzfeldt-Jakob Disease |
| QCD | Quantum ChromoDynamics |
| UNESCO | United Nations Educational |