| Acronym | Meaning |
| PT | Petatesla -Physical Training (in The Army) -Portugal (ISO 3166 Digram) |
| CHRS | Canadian Heart Rhythm Society |
| VZW | Vereniging Zonder Winstoogmerk (Dutch Non-profit Organisation) |
| WRT OR W/R/T | With Respect To Or With Regard To |
| CDS | Chief Of The Defence Staff |
| NAO | UK National Audit Office |
| ACOBA | Advisory Committee On Business Appointments |
| USD(C) | (U.S.) Under-Secretary Of Defense (Comptroller) |
| BL | Bolivia (FIPS 10-4 Country Code) -British Leyland |
| AAD | Analogue-Analogue-Digital (CD Quality) - Australian Antarctic Division |