| Acronym | Meaning |
| SPS | Sine Prole Superstite (Latin |
| AD | Air Defence -Andorra (ISO 3166 Digram) -Anno Domini (Latin |
| TDRS | Tracking Data And Relay Satellite |
| PN | Petanewton - Pitcairn Islands (ISO 3166 Digram) |
| SKM | Sikkim (ISO 3166 Trigram; Obsolete 1975) |
| ECCM | Electronic Counter-Counter-Measures |
| CNN | Cable News Network - Cellular Nonlinear Network |
| J7 | Joint Operational Plans & Interoperability Directorate |
| MHWN | Mean High Water Neaps (nautical Charts) |
| FSA | Fire Support Area - UK Food Standards Agency - Functional Solution Analysis |