| Acronym | Meaning |
| MEG | MagnetoEncephaloGraphy |
| RCCO | Royal Canadian College Of Organists |
| ACID | Atomicity |
| PAPI | Precision Approach Path Indicator (aviation) |
| HORIZON | H?licopt?re D'observation Radar Et D'investigation Sur Zone (French |
| BSW | British Standard Whitworth (screw Thread) |
| YS | Yottasiemens |
| MOSS | MObile Submarine Simulator -Moving Object Support System |
| HOT | Highly Optimised Tolerance |
| JP | Japan (ISO 3166 Digram) -Justice Of The Peace |