| DMSP | Defense Meteorological Satellite Program |
| DSCS | Defense Satellite Communications System Littleton, CO, USA, http://www.lockheedmartin.com |
| DSP | Defense Support Program [USAF/NRO] |
| APPC | Advanced Program-to-Program Communication [engl.] Firmenbezeichnung [IBM] |
| AIRMET | AIRman's METeorological Information |
| WMO | World Meteorological Organisation Genf, http://www.wmo.ch |
| EMS | European Meteorological Society |
| IMC | Instrument Meteorological Contitions |
| WMO | World Meteorological Organization |
| JMA | Japan Meteorological Agency |
| AMS | American Meteorological Society |
| SIGMET | Significant Meteorological Forecast |
| MSC | Meteorological Service of Canada |
| Bull. Am. Meteorol. Soc. | Bulletin of the American Meteorological Society Zeitschrift |
| AMO | Allied Meteorological Office [engl.] Wetterdienst der NATO |
| AMeDAS | Automated Meteorological Data Acquisition System |
| METAR | Meteorological Aviation Routine Weather Report |
| AMOS | Automatic Meteorological Observation Station [engl.] Wetter-Beobachtungsstation |
| UKMO | United Kingdom Meteorological Office [Brit. Wetterdienst] |
| cd | Civil Defense |
| DoD | US Department Of Defense Washington, D.C., http://www.defenselink.mil |
| ADA | Air Defense Artillery |
| DCA | Defense Communications Agency |
| DFCE | Defense Control Element |
| OSD | Office of the Secretary of Defense |
| NMD | National Missile Defense |
| DDN | Defense Data Network, USA |
| NADEFCOL | NATO Defense College |
| NDEA | National Defense Education Act |
| DLA | Defense Logistics Agency |
| ASDF | Air Self Defense Force [engl.] Luftverteidigungskräfte |
| TMD | Theater Missile Defense Regionale Raketenabwehr |
| DSN | Defense Switched Network |
| TVD | Total Virus Defense |
| NRDC | Natural Resource Defense Council |
| DCTN | Defense Commercial Telecommunications Network |
| OTDC | Office of Defense Trade Controls |
| DODCI | Department Of Defense Computer Institute |
| SDIO | Strategic Defense Initiative Organisation 1984 im US-Verteidigungsministerium geschaffene Raketenabwehrbehörde |
| DGSC | Defense General Supply Center |
| SDI | Strategic Defense Initiative [US-Regierung] während der Reagan-Administration erdachtes weltraumgestütztes Raketenabwehrsystem |
| DISN | Defense Information Systems Network |
| ADAT | Air Defense Advanced Technology [engl.] Verbesserte Luftabwehrtechnik |
| DISA | Defense Information System Agency |
| BMD | Ballistic Missile Defense [engl.] Raketenabwehrsystem |
| DCCO | Defense Commercial Communications Office |
| DISNet | Defense Integrated Secure Network |
| DIDS | Defense Integrated Data System |
| CDI | Center for Defense Information [engl.] amerikanische Zentrale für Verteidigungsinformationen |
| ABCD | Atomic, Biological and Chemical Defense [engl.] Verteidigung gegen ABC-Waffen |