| Acronym | Meaning |
 | IUCN | International Union For The Conservation Of Nature And Natural Resources (World Conservation Union) |
| CTU | Counter Terrorist Unit (fictional Branch Of The Central Intelligence Agency In The Television Action Series 24) |
| DCYSC | Discovery Channel Young Scientist Challenge |
| TOGS | Thermal Observation Gunnery Sight |
| JET | Joint European Torus |
| HEPA | High-Efficiency Particulate Air (filter) |
| WH | Wehrmacht Heer (German WW2 Army Vehicle Licence Plate Code) |
| IA | Iowa (postal Symbol) |
| SR | Sound Reinforcement - Supply Route -Suriname (ISO 3166 Digram) -Sveriges Radio (Swedish Radio Ltd) |
| PARC | Palo Alto Research Center |
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