| Acronym | Meaning |
 | PU | Guinea-Bissau (FIPS 10-4 Country Code) -Polyurethane -United States Miscellaneous Pacific Islands (ISO 3166 Digram; Obsolete 1986) |
| PN | Piconewton |
| AFJ | April Fool's Joke |
| B/F | Before |
| DPMO | (U.S.) Defense Prisoner Of War/Missing Personnel Office |
| WPE | World Pork Expo |
| PETE | PolyEthyleneTErephthalate |
| FO | Faroe Islands (ISO 3166 Digram; FIPS 10-4 Territory Code) -Force Operations (military) - Forward Observer - Frame Optional (military Symbology) |
| HE | Hebrew Language (ISO 639-1 Code) |
| SAD | Seasonal Affective Disorder - Situational Awareness Display |
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