| Acronym | Meaning |
 | RT | PCR -Real Time Polymerase Chain Reaction Or Reverse Transcriptase Polymerase Chain Reaction. Clarified With Real Time RT-PCR Or Reverse Transcriptase RT-PCR Where Appropriate. |
| AR | Argon |
| SH | Saint Helena (ISO 3166 Digram) -SONATRACH (Algerian Petroleum Company) |
| CDEC | U.S. Combat Development Experimentation Center |
| GWAS | Grand Western Archery Society |
| ALF | Africa Leadership Forum - Alien Life Form - Animal Liberation Front |
| LGBT | Lesbian |
| NAVEUR | Naval Forces U.S. European Command |
| NEO | Near-Earth Object - Non-combatant Evacuation Operations |
| IICA | Inter-American Institute For Cooperation On Agriculture |
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