| Acronym | Meaning |
| NTC | National Training Center - Negative Temperature Coefficient (thermistor) |
| JCS | Joint Chiefs Of Staff |
| SP | Special - Spring Tide (nautical Charts) |
| CPSU | Communist Party Of The Soviet Union |
| ITS | Incompatible Time-sharing System - Individual Training Standards |
| GCSE | General Certificate Of Secondary Education (UK) |
| BOC | British Orthodontic Society - British Oxygen Company |
| PAN | Panama (ISO 3166 Trigram) -Personal Area Network -PolyAcryloNitrile |
| HIV | Human Immunodeficiency Virus |
| PW | Palau (postal Symbol; ISO 3166 Digram) - Petawatt |