| Acronym | Meaning |
| TOS | Tape Operating System - Terms Of Service - Tramiel Operating System |
| EN | English Language (ISO 639-1 Code) |
| GPA | Grade Point Average |
| HPA | UK Health Protection Agency |
| YM | Yoctometre |
| KJ | Kuanyama Language (ISO 639-1 Code) |
| FOOP | Friends Of Organ Pipes (Volunteer Group) |
| NVG | Night Vision Goggles |
| 4WD | Four Wheel Drive (cf. AWD) |
| PDT | Pacific Daylight [Saving] Time (UTC-7 Hours) |