| Acronym | Meaning |
| PBX | Private Branch EXchange (company Phone System) |
| YI | Serbia And Montenegro (deprecated FIPS 10-4 Country Code |
| SSE | South South-East -Streaming SIMD Extensions |
| RMA | Return Mailing Authorization - Revolution In Military Affairs |
| OHP | Observatoire De Haute-Provence |
| ZI | Zimbabwe (FIPS 10-4 Country Code) |
| H.C. | Honoris Causa (Latin |
| TUK | Turkmen Language (ISO 639-2 Code) |
| INFORMS | (U.S.) Institute For Operations Research And The Management Sciences |
| SADL | Situation Awareness Data Link (saddle) - Structural Architecture Description Language |