| Acronym | Meaning |
| RUS | Russian Language (ISO 639-2 Code) |
| YSA | Youth Service America - Young Socialist Alliance |
| DNDO | U.S. Domestic Nuclear Detection Office |
| RP | Philippines (FIPS 10-4 Country Code) -Release Point - Role-Playing |
| ERN | Eritrean Nakfa (ISO 4217 Currency Code) |
| RPM | Revolutions Per Minute |
| YT | Yoctotesla |
| CVSD | Continuous Variable Slope Delta (modulation) |
| BN | Brunei (ISO 3166 Digram; FIPS 10-4 Country Code) |
| AVRE | Armoured Vehicle Royal Engineers |