| Acronym | Meaning |
| FE | Iron (Latin Ferrum) |
| HEP | High-Explosive Plastic (ammunition) |
| IMPATT | IMPact Avalanche Transit Time Diode |
| CAFE | Corporate Average Fuel Economy Standard |
| ERI | Eritrea (ISO 3166 Trigram) |
| CRD | Capstone Requirements Document |
| TTFN | Ta Ta For Now |
| PEBKAC | Problem Exists Between Keyboard And Chair (ditto) |
| PI | P?li Language (ISO 639-1 Code) |
| TOMS | Total Ozone Mapping Spectrometer (satellite Instrument) |