| Acronym | Meaning |
 | PR | Public Relations -Puerto Rico (postal Symbol; ISO 3166 Digram) |
| BAK | Bashkir Language (ISO 639-2 Code) |
| RSA | Regimental Support Area - Republic Of South Africa -Rivest-Shamir-Adleman Encryption |
| VNS | Virtual Network System |
| SM | Samarium |
| PD | Per Diem (Latin: (calculated) By The Day) - Point Of Departure - Police Department - Postal District - Potential Difference - Principal Deputy - Public Domain |
| NRA | National Rifle Association |
| ECM | Electronic Counter-Measures - Enterprise Content Management |
| RTA | Road Traffic Accident (British) |
| LU | Lutetium |
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