| Acronym | Meaning |
 | CIMMYT | Centro Internacional De Mejoramiento De Maz Y Trigo (Spanish |
| PRT | Portugal (ISO 3166 Trigram) -Provincial Reconstruction Team |
| UWTG | Under Water Tug |
| BNS | Bank Of Nova Scotia |
| PDF | Panama[nian] Defense Forces (abolished 1990) - Portable Document Format - Principal Direction Of Fire |
| PIF | Partners In Flight |
| HMSO | Her Majesty's Stationery Office |
| ANC | African National Congress |
| CHP | California Highway Patrol - Combined Heat And Power |
| BCER | British Columbia Electric Railway |
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