| Acronym | Meaning |
 | PAMELA | Pedestrian Accessibility And Movement Environment Laboratory |
| MITL | Man-In-The-Loop |
| AU | African Union (was OAU Before 2000) - American University -Astronomical Unit - Australia (ISO 3166 Digram) - Austria (FIPS 10-4 Country Code) |
| CSC | Closed Spacelike Curve (relativity) - Computer Security Centre |
| CHN | China (ISO 3166 Trigram) |
| NAVMACS | Naval Modular Automatic Communication Subsystem |
| AH | Attohenry |
| TZC | Tetrazolium Chloride |
| UPF | Universitat Pompeu Fabra (Catalan |
| CIPE | (European) Centre For International Political Economy |
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