| Acronym | Meaning |
| SSN | Nuclear-Powered Attack Submarine (US Navy Hull Classification) -SIM Serial Number - Social Security Number - Socialist Solidarity Network - Subsystem Number (SCCP |
| KUA | Kuanyama Language (ISO 639-2 Code) |
| CHI | Computer-Human Interaction |
| MCDL | Model Composition Definition Language |
| GD | Scottish Gaelic Language (ISO 639-1 Code) |
| DUI | Data Use Identifier - Data Use Institute - Davis Unified Ignition - Diving Unlimited International - Documento ?nico De Identidad - Documento Unico De Importaci›n - Driving Under The Influence - Duke University Improv |
| PG&E | Pacific Gas & Electric |
| IRL | Ireland (ISO 3166 Trigram) - Industrial Research Limited |
| SOX | Sarbanes-Oxley |
| CLIC | Compact LInear Collider |