D Depth
DA Days after Acceptance
DA Department of Agriculture
DA Deposit Account
D/A Digital to Analog converter
DA Directory Assistance (/C = computerized, /M = Microfilm) (Telefonia)
DA District Attorney
DA Don't Answer (Telefonia) (may be more general)
DAC Digital to Analog Converter
DA/C Directory Assistance/Computerized
DACCS Digital Access Cross Connect System (Telefonia) (veja também DACS)
DACS Digital Access Cross-connect System (Telefonia)
DAD Draft ADdendum
DAG Directed Acyclic Graph
DAL Dedicated Access Line (Telefonia)
DA/M Directory Assistance/Microfilm
DAP Division Advisory Panel (of NSF (q.v.) DNCRI (q.v.))
DAR Daughters of the American Revolution
DARE Drug Abuse Resistance Education
DARPA Defense Advanced Research Projects Agency (do DoD, veja também ARPA)
DASD Direct Access Storage Device
DAT Digital Audio Tape
DATA Defense Air Transport Administration
DAV Disabled American Veterans
DB DataBase
db decibel(s)
dba doing business as
DBF DBase Format
DBME DataBase Managment Environment
dbms DataBase Management System 
DBRAD Data Base Relational Application Directory
DC Direct Current (dc, veja também AC)
DC District of Columbia
DCA Defense Communications Agency
DCA Distributed Communication Architecture
DCA Document Content Architecture
DCC Descriptive Cataloging Committee
DCCO Defense Commercial Communications Office
DCD Data Carrier Detect (às vezes CD (q.v.)) (EIA RS-232-C)
DCE Data Communication Equipment
DCL Digital Command Language
DCP Distributed Communications Processor
DCTS Dimension Custom Telephone Service
DD Daredevils
DD Data Dictionary
DD Days after Date
DD Demand Draft
DD Dishonorable Discharge
DD Disk Drive
DD Doctor of Divinity
D&D Dungeons & Dragons
DDC Digital Data Converter
DDCU DC-to-DC Converter Unit (Espacial)
DDD Direct Distance Dialing (Telefonia) 
DDL Document Description Language
DDN Defense Data Network
DDP Distributed Data Processing
DDS Dataphone Digital Service [AT&T]
DDS Digital Data Service
DDS Direct Digital Service
DDS Doctor of Dental Science
DDS Doctor of Dental Surgery
DDT DEC Debugging Tape
DDT Di-<something> (pesticida)
DDT Dynamic Debugging Technique
DE Delaware
DEA Drug Enforcement Agency (Governo americano)
DEAR Department of Energy Acquisition Regulation
DEC Digital Equipment Corporation (nome de companhia)
DECUS Digital Equipment Corporation Users Society
DES Data Encryption Standard [NIST]
DEW Distant Early Warning (como em DEW Line)
DF Damage Free
D/F Direction Finding
DFC Distinguished Flying Cross
DFD Data Flow Diagram
DFE Data Flow Editor
DFM Distinguished Flying Medal
DFN Deutsche Forschungsnetz Verein (German Research Network Association)
DFRF Dryden Flight Research Facility (Espacial)
DFS Depth-First Search
DFW Dallas-Ft.Worth (aeroporto regional)
DG Data General (nome de companhia)
DG Dei Gratia (por uma graça de Deus)
DG Director General
DGSC Defense General Supply Center
DHHS Department of Health and Human Services
DHSS british Department of Health and Social Security
DHSS Department of Health and Social Security (Britânico)
DIA Document Interchange Architecture
DIAD (magnético) Drum Information Assembler / Dispatcher
DIAL Direct Information Access Line
DIAS Defense Automatic Integrated System
DID Direct Inward Dialing (Telefonia)
DIF Document Interchange Format
DIN Deutsches Institut fur Normung
DIRE Dire Is Really Emacs
DIS Draft International Standard [ISO]
DISA Data Interchange Standards Association
DISOSS Distributed Office Support System [IBM]
DIY Do It Yourself
DJ Disc Jockey
DLA Defense Logistics Agency
DLI Data Link Interface(?)
DLL Data Link Layer [ISO OSI]
DLL Dial Long Line equipment
DLO Dead Letter Office
DM Dungeon Master
DMA Direct Memory Access
DMD Doctor of Dental Medicine
DME Distance Measuring Equipment
DMF Probably part of an X.400 address in Europe
DMOS Diffusion Metal Oxide Semiconductor (veja também MOS)
DMSP Defense Meteorological Satellite Program (Espacial)
DMV Department of Motor Vehicles
DMV Department of Motor Vehicles (Califórnia)
DMZ DeMilitarized Zone
DNA DeoxyriboNucleic Acid
DNA Digital Network Architecture [DEC]
DNCRI [NSF] (q.v.) Division of Networking and Communications Research and Infrastructure
DNHR Dynamic NonHierarchical Routing
DNIC Data Network Identification Code (Telefonia)
DNIS Dialed Number Identification Service (veja também DID) (Telefonia)
DNL Director of Naval Laboratories
DNR Dialed Number Recorder (Telefonia)
DNS Domain Name System
DOA Dead On Arrival
DOB Date Of Birth
DOC Dynamic Overload Control
DOD Department Of Defense (Governo americano) (às vezes DoD)
DOE Department of Energy (Governo americano)
DOHC Dual OverHead Cams [Automotive]
DOMAIN Distributed Operating Multi Access Interactive Network (Apollo)
DOS Disk Operating System
DOT Department Of Transportation (Governo americano)
DOT&E Director, Operational Test and Evaluation
DOV Data Over Voice (Telefonia)
DOY Day of Year
DP Data Processing
DP Dial Pulse (Telefonia)
DP Displaced Persons (expelido de terra nativa)
DP Display Postscript
DP Double Penetration
DP Double Play
DP Draft Proposal
DPA Delegation of Procurement Authority
DPANS Draft Proposed American National Standard
DPI Dots Per Inch
DPS Display PostScript
DQ Dairy Queen
DQ Dragon Quest
DQDB Distributed Queue Dual Bus (IEEE 802.6) [Telefonia, Networking]
DQL Database Query Language
DR Dead Reckoning
DR Dining Room
DRAM Dynamic Random Access Memory (ao invés de RAM estática)
DRD Data Reading Device
DRE Directional Reservation Equipment
DRG Democratic Republic of Germany (Leste Alemão)
DRI Defense Research Internet
DRI Digital Research, Incorporated (nome de companhia)
d.s. died single (Genealogia)
DS Double-Sided
DS Draft Standard
DSA Dial System Assistance
DSE Data Structure Editor
DSEE Domain Software Engineering Environment
DSM Distinguished Service Medal
DSO Distinguished Service Order
DSP Decessit Sine Prole 
DSP Digital Signal Processing
DSRI Digital Standard Relational Interface
DSS Decision Support System
DSS Direct Station Selection (Telefonia)
DST Daylight Saving Time
DSTN Double SuperTwisted Nematic
DSU Digital Service Unit
DT Delirium Tremens
DTE Data Terminal Equipment
DTF Dial Tone First payphone (Telefonia)
DTMF Dial Tone Multi Frequency (Telefonia)
DTP DeskTop Publishing
DTR Data Terminal Ready (EIA RS-232-C)
DUI Driving Under the Influence
DUT Device Under Test
DV Deo Vo lente 
DVM Digital Volt Meter
DVM Doctor of Veterinary Medicine
DWAPS Defense Warehousing Automated Processing System
DWI Died Without Issue (Genealogia)
DWI Driving While Intoxicated
DWIM Do What I Mean
DX Distance (como em longa distância de comunicação de rádio)
DXT Data eXtractT facility
d.y. died young (Genealogia)
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