| Acronym | Meaning |
 | TLS | Timor-Leste (ISO 3166 Trigram) -Times Literary Supplement |
| ISA | Individual Savings Account - Industry Standard Architecture - Instruction Set Architecture - International Seabed Authority |
| ARG | Argentina (ISO 3166 Trigram) |
| RHIC | Relativistic Heavy Ion Collider |
| RE | Rhenium |
| YK | Yoctokelvin |
| RARDE | UK Royal Armament Research And Development Establishment (1962?1991) |
| PDA | Personal Digital Assistant - Predicted Drift Angle - Public Display Of Affection - Push-Down Automaton |
| MHZ | Megahertz |
| LTL | Lithuanian Litas (ISO 4217 Currency Code) |
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