| Acronym | Meaning |
 | COS | Cooper Ornithological Society |
| INDIGO | (U.S.) INtelligence DIvision Gaming Operation |
| LIM | Limburgish Language (ISO 639-2 Code) |
| LEO | Low Earth Orbit |
| TATP | TriAcetone TriPeroxide |
| WVSC | Women's Volunteer Service Corps (WWII Canada) |
| ASMB | Adult Swim Message Board |
| MATS | U.S. Military Air Transport Service (1948-1966) |
| CEV | Combat Engineer Vehicle - Crew Exploration Vehicle |
| APS | American Physical Society - Antiphospholipid Antibody Syndrome |
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