| Acronym | Meaning |
 | PS | Picosiemens |
| DZO | Dzongkha Language (ISO 639-2 Code) |
| RA | Rain (METAR Code) -Rear Area - Reinforced Alert - Republican Army - Right Ascension - Royal Artillery (UK) - Royal Academy |
| DSD | Defence Studies Department (King's College |
| AVRE | Armoured Vehicle Royal Engineers |
| TOS | Tape Operating System - Terms Of Service - Tramiel Operating System |
| FDR | Flight Data Recorder - Franklin Delano Roosevelt |
| RSS | Really Simple Syndication |
| ILDS | Improved Landmine Detection System |
| LVA | Latvia (ISO 3166 Trigram) |
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