DE
- de – (s) German language (ISO 639-1 code)
- DE – (s) Delaware (postal symbol) – Germany (ISO 3166 digram)
- DEA – (i) Drug Enforcement Agency
- DEC – (a/i) Department of Environmental Conservation – Digital Equipment Corporation – Disasters Emergency Committee
- DeCA – (p) (U.S.) Defense Commissary Agency
- DECSIM – (p) Model DEComposition and SIMulation algorithm – Directed Energy Combat SIMulation
- DECT – (a) Digital European Cordless Telephone
- DEFCON – (p) Defence readiness condition
- DEFRA – (a) (UK) Department for Environment, Food and Rural Affairs
- DELT – (a) Dual Ended Line Test (ing)
- DEM – (i) Data Exchange Mechanism – Digital Elevation Model
- DEN – (s) Denmark (IOC and FIFA trigram, but not ISO 3166)
- DEPSECDEF – (p) (U.S.) Deputy Secretary of Defense
- DERA – (a) British Defence Evaluation and Research Agency (1995–2001)
- DES – (i) Deep Ecliptic Survey
- deu – (s) German language (ISO 639-2 code)
- DEU – (s) Germany (ISO 3166 trigram)
Read more about this topic: List Of Acronyms And Initialisms: D