| Acronym | Meaning |
 | HAART | Highly Active Anti-Retroviral Therapy |
| HBV | Hepatitis B Virus |
| DFAS | (U.S.) Defense Finance And Accounting Service |
| LF | Low Frequency |
| SH | Saint Helena (ISO 3166 Digram) -SONATRACH (Algerian Petroleum Company) |
| AMS | Agriculture Marketing Service - American Mathematical Society |
| Y | Yocto |
| RAC | Royal Automobile Club (in The United Kingdom |
| RM | Raeto-Romansh Language (ISO 639-1 Code) |
| PAPI | Precision Approach Path Indicator (aviation) |
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