| Acronym | Meaning |
 | ABCS | (U.S.) Army Battle Command System |
| MACHO | MAssive Compact Halo Object |
| IBO | Igbo Language (ISO 639-2 Code) |
| YHBT | You Have Been Trolled |
| ISL | Iceland (ISO 3166 Trigram) |
| SBB | German For The Swiss Federal Railways |
| ETC/RMT | Explosive Transient Camera/Rapidly Moving Telescope |
| COROT | COnvection |
| ACA | Airspace Control Authority - Airspace Co-ordination Area - A Current Affair |
| ER | Erbium |
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