| Acronym | Meaning |
| AO | Angola (FIPS 10-4 Country Code; ISO 3166 Digram) -Approach Officer (submarine) - Area Of Operations |
| HOT | Highly Optimised Tolerance |
| ISCII | Indian Standard Code For Information Interchange |
| DSTL | British Defence Science And Technology Laboratory |
| FACS | Formal Aspects Of Computing Science - Fluorescent-activated Cell Sorting |
| CC | Many |
| SEG | Special Escort Group |
| VMASC | Virginia Modeling Analysis & Simulation Center (vee-mask) |
| CSIP | Commercial Stable Image Platform (AMD) |
| ODAS | OCA-DLR Asteroid Survey |