| Acronym | Meaning |
 | PDF | Panama[nian] Defense Forces (abolished 1990) - Portable Document Format - Principal Direction Of Fire |
| PNP | Partido Nuevo Progresista - Plug 'N' Play/Pray - Positive Negative Positive |
| ORD | O'hare International Airport In Chicago |
| AU | African Union (was OAU Before 2000) - American University -Astronomical Unit - Australia (ISO 3166 Digram) - Austria (FIPS 10-4 Country Code) |
| OSE | Own Separate Entrance |
| UDT | Underwater Demolition Team |
| MOTA | Member Of The Orthodontic Technicians Association |
| KI | Kibi |
| XRML | EXtensible Rights Markup Language |
| TWI | Twi Language (ISO 639-2 Code) |
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