| Acronym | Meaning |
| DACT | Data Automated Communications Terminal - Dissimilar Air Combat Training |
| MPA | Millipascal |
| RB | Rubidium |
| DES | Deep Ecliptic Survey |
| IO | British Indian Ocean Territory (ISO 3166 Digram; FIPS 10-4 Territory Code) |
| TIMS | Tactical Internet Management System - The Institute Of Management Sciences - The International Molinological Society - Thermal Infrared Multispectral Scanner - Thermal Ionization Mass Spectrometry - Travel Information Management Services - Tuberculosis In |
| VAT | Value-Added Tax -Vatican City-State (ISO 3166 Trigram) |
| SSGN | Nuclear-Powered Guided Missile Submarine (US Navy Hull Classification) |
| RE | Royal Engineers |
| MOSS | MObile Submarine Simulator -Moving Object Support System |