| Acronym | Meaning |
 | HD | Henry Draper (star Catalogue) - Hull-Down (armoured Vehicle Target |
| PSG | Pacific Seabird Group |
| OMN | Oman (ISO 3166 Trigram) |
| MEK | Magyar Elektronikus Konyvtar - Message Encryption Key - Methyl Ethyl Ketone -Mujahideen Al-Khalq |
| AASPEM | Advanced Air-to-air System Performance Evaluation Model |
| SBB | German For The Swiss Federal Railways |
| TZC | Tetrazolium Chloride |
| SSRN | Nuclear-Powered Radar Picket Submarine (retired US Navy Hull Classification) |
| LTL | Lithuanian Litas (ISO 4217 Currency Code) |
| TCU | Texas Christian University |
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