| Acronym | Meaning |
 | BIST | Built-In Self-Test |
| CSC | Closed Spacelike Curve (relativity) - Computer Security Centre |
| IETF | Internet Engineering Task Force |
| AIAA | American Institute Of Aeronautics And Astronautics |
| MLB | Major League Baseball |
| ID | Idaho (postal Symbol) -Identity -Indonesia (FIPS 10-4 Country Code; ISO 3166 Digram) -Infantry Division - Intelligent Design |
| TWD | Taiwan Dollar (ISO 4217 Currency Code) |
| SEC | U.S. Securities And Exchange Commission -Security - Southeastern Conference |
| GEO | Geostationary Earth Orbit -Georgia (ISO 3166 Trigram) |
| DMT | Dimethyltryptamine |
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