| Acronym | Meaning |
| OBS | Observation/Observer - Obsolete - Obstacle -Off Balance Sheet - Optical Burst Switching (IEEE) - Organic Brain Syndrome - Organization(al) Breakdown Structure |
| AADC | Area Air Defence Commander |
| MEL | Maya Embedded Language - Michigan Electronic Library |
| SADD | Students Against Drunk Driving (national School Related Group) |
| PAI | PolyAmide Imide |
| KH | Cambodia (ISO 3166 Digram) |
| IONA | Islands Of The North Atlantic (alternate Name For Great Britain |
| JOD | Jordanian Dinar (ISO 4217 Currency Code) |
| LWR | Laser Warning Receiver |
| PANS | Pretty Advanced/Awesome Network Services (cf. POTS) |