| Acronym | Meaning |
| PLL | Phase-Locked Loop (electronics) |
| WRS | Worldwide Reference System |
| BIAP | Baghdad International Airport -Biafran Pound |
| KFC | Kentucky Fried Chicken |
| IAUC | International Astronomical Union Circular |
| MCO | Monaco (ISO 3166 Trigram) -Movement Control Officer -Major Combat Operation |
| MBCS | Multi-Byte Character Set |
| DRI | Detection |
| CAW | Canadian Auto Workers Trade Union |
| ODB | Operational Data Base -Oxford Dictionary Of Byzantium |