| Acronym | Meaning |
| TJD | Truncated Julian Day |
| PEN | Peruvian Sol (ISO 4217 Currency Code) -PolyEthylene Naphthalate |
| ABCS | (U.S.) Army Battle Command System |
| NNO | Norwegian Nynorsk Language (ISO 639-2 Code) |
| PCAS | Planet-Crossing Asteroid Survey |
| NDE | Northern Ndebele Language (ISO 639-2 Code) |
| XML | EXtensible Markup Language |
| ATCCIS | Army Tactical Command And Control Information System |
| MHHW | Mean Higher High Water (nautical Charts) |
| CUCV | Commercial Utility Cargo Vehicle |