| Acronym | Meaning |
| DEM | Data Exchange Mechanism - Digital Elevation Model |
| POP | Point Of Presence - Post Office Protocol - Progesterone Only Pill |
| HD | Henry Draper (star Catalogue) - Hull-Down (armoured Vehicle Target |
| ANOVA | ANalysis Of VAriance |
| MASER | Microwave Amplification By Stimulated Emission Of Radiation |
| USMC | United States Marine Corps |
| POSH | Port Outbound Starboard Home (alleged) |
| DK | Denmark (ISO 3166 Digram) |
| ISRO | Indian Space Research Organisation |
| HTML | HyperText Markup Language |