| Acronym | Meaning |
| TOS | Tape Operating System - Terms Of Service - Tramiel Operating System |
| CALL | (U.S.) Center For Army Lessons Learned |
| APR | Annual Percentage Rate |
| XMSF | EXtensible Modelling And Simulation Framework |
| TANJ | There Ain't No Justice (used As Expletive In The Ringworld Novels) |
| MJ | Megajoule |
| LHS | Left Hand Side |
| SSO | Submarine Oiler (retired US Navy Hull Classification) |
| DLRP | Data Link Reference Point |
| OSL | Open Source License - Optically Stimulated Luminescence - Orbiting Solar Laboratory |