| Acronym | Meaning |
| HTA | HyperText Application |
| CDM | Clean Development Mechanism (Kyoto Protocol) - Cold Dark Matter (astronomy) |
| OHIP | Ontario Health Insurance Plan |
| M&S | Modelling & Simulation - Marks & Spencer |
| DVD | Digital Versatile Disk (was Digital Video Disk) |
| CAA | Canadian Automobile Association - (NORAD) Center For Aerospace Analysis - (U.S.) Center For Army Analysis - (U.S.) Clean Air Act - (U.S. Army) Concepts Analysis Agency - Civil Aviation Authority - Colonial Athletic Association |
| LOMEZ | Low Altitude Missile Engagement Zone |
| AFN | Afghani (ISO 4217 Currency Code) |
| LDAP | Lightweight Directory Access Protocol (pronounced Ell-dap) |
| LUX | Luxembourg (ISO 3166 Trigram) |