| Acronym | Meaning |
 | BMW | Bayerische Motoren Werke (German |
| PIN | Personal Identification Number |
| IISS | International Institute For Strategic Studies |
| TATT | Tired All The Time (medical Diagnosis In-joke) |
| NK | Nanokelvin |
| NAVSPASUR | U.S. Naval Space Surveillance System |
| SIMNET | SIMulator NETwork |
| TNO | Trans-Neptunian Object |
| MTL | Maltese Lira (ISO 4217 Currency Code) -Mean Tide Level (nautical Charts) |
| ECS | Emergency Contact System - Enhanced Chip Set (computing) - EOSDIS Core System - Extended Chip Set (computing) |
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