| Acronym | Meaning |
| PIB | PolyIsoButylene |
| MCM | Mine Counter-Measures |
| SE | Selenium |
| CUPS | Common Unix Printing System |
| USNO | U.S. Naval Observatory |
| ITA | Italian Language (ISO 639-2 Code) |
| CTS | Clear-To-Send - Collective Training Standards - Communications Technology Service - Contract Technical Services - Conversation Time Sharing - COSMIC Top Secret |
| SLE | Sierra Leone (ISO 3166 Trigram) |
| DOM | Deo Optimo Maximo (Latin |
| MEC | Maine Central Railroad (AAR Reporting Mark) - Manta |