Department of Defense database of individuals eligible for certain benefits) 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) DF DF (i) Direct Fire Direction Finding Distrito Federal (Spanish and Portuguese for "federal district") DFAD – (p) Digital Feature Analysis Data ("dee-fad") DFAS – (i) (U.S.) Defense Finance and Accounting Service DFB – (i) Deutscher Fußball-Bund (German for "German Football Association") DFCB – (i) Data Format Control Book DfID – (i) UK Department for International Development DFL (i) Democratic–Farmer–Labor (the full designation of the Minnesota affiliate of the U.S. Democratic Party) Deutsche Fußball Liga (German for "German Football League"), the operator of the top two leagues of German football DFM – (i) Dynamic Flowgraph Methodology DFM – (ii) Discrete Field Model see Superluminal motion DFSP – (i) Dermatofibrosarcoma protuberans DfT– (i) Department for Transport DFTBA – (i) Don't Forget To Be Awesome- a term commonly used by the Vlogbrothers DG DG – (i) Dei gratia (Latin, "by the grace of God") – Director-General – Data General DGA – (i) Direction générale des armées (French "Armed Forces General Directorate") DGAF – (I) Don't give a f*** DGD&D – (i) UK Directorate General of Development and Doctrine DGPS – (i) Differential GPS DGZ – (i) Desired Ground Zero DH DH – (i) dear husband (increasingly prevalent on social mailing lists, blogs, and bulletin boards) – Designated hitter DHA – (p) DocosaHexaenoic Acid DHHS – (i) (U.S.) Department of Health and Human Services DHL – (i) Dalsey, Hillblom, and Lynn (courier service) DHRA – (i) (U.S.) DoD Human Resources Activity DHS – (i) U.S. Department of Homeland Security DHSS – (i) UK Department of Health and Social Security DHTFYSS – (i) U.S. Don't Have Time For You Silly S**** DHY – (s) Dahomey (ISO 3166 trigram; became BEN for Benin in 1977) DI DIA – (i) U.S. Defense Intelligence Agency DIAC – (a) Department of Immigration and Citizenship (Australia) DiC – Design Island Centre (computing usually used in