| Acronym | Meaning |
 | OPCON | Operational Control |
| ARBA | Army Review Boards Agency |
| PMCS | Partial Mission Capable Supply (SM&R Code) - Power Management Control System - Professional Military Comptroller School |
| TI | Tigrinya Language (ISO 639-1 Code) |
| OD | Old Dragon - Ordnance Datum (nautical Charts) -Overdose |
| HN | Honduras (ISO 3166 Digram) |
| HEAT | High Explosive Anti-Tank (ammunition) |
| OIOC | Oriental & India Office Collections (in The British Library) |
| CPU | Central Processing Unit |
| ICD | Implantable Cardioverter-Defibrillator - Initial Capabilities Document - International Classification Of Diseases |
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