D/A Digital to Analog¹
DAA Data Access Arrangement +
Decimal Adjust for Addition
DAB Digital Audio Broadcasting
DAC Data Acquisition and Control +
Digital to Analog Converter +
Dual² Attachment³ Concentrator
DACL Discretionary Access Control List
DAD Desk Application Director [Borland]
DAE Digital Audio Extraction
DAI Distributed Artificial Intelligence
DAL Data Access Language [Apple Computer] +
Disk Access Lockout
DAM Data Acquisition and Monitoring
DAMPS Digital AMPS
DAO Data Access Object [Microsoft]
DAP Data Access Protocol⁴ [DEC] +
Developer Assistance Program
DAPIE Developers Application Programming Interface⁵ Extensions
DARI Database Application Remote Interface [IBM]
DARMS Digital Alternate Realization⁶ of Musical Symbols
DART Digital Audio Reconstruction⁷ Technology
DAS Decimal Adjust for Subtraction⁸ +
Dual-Attached Station
DASD Direct Access Storage Device [IBM]
DAT Digital Audio Tape + Disk Array Technology
.DAT Data (file name extension)
DATACOM Data Communications
DAV Digital Audio-Video
DAVIC Digital Audio-Visual Council
dB Decibel
DB Data Base + Data Buffer⁹ + Device Bay
dBA Adjusted Decibel
DBC Device Bay Controller
DBCS Delivery Bar Code Sorter + Double-Byte Character Set
.DBF Database (file name extension)
DBIS Dun & Bradstreet Information Services
DBM Data Base Manager
DBMS Data Base Management System
DBR DOS Boot Record
DBS Data Base Server +
Direct (to home) Broadcast (satellite) System
DBV Digital Broadcast Video
DB2 Database 2
DC Data Collection + Data Communication + Data Control +
Device Control + Direct Current
D2C Decimal To Character [REXX]
DCA Digital Communications Associates +
document Content Architecture [IBM]
DCAF Distributed Console Access Facility [IBM]
DCAM Digital Camera + Direct Chip Attach Module
DCB Device Control Block + Disk Coprocessor Board [Novell]
DCC Data Country Code + Digital Command Control +
Digital Compact Cassette + Direct Cable/Client Connection
+ Display Combination Code
DCD Data Carrier Detect
DCE Data Circuit-Terminating Equipment +
Data Communications Equipment +
Distributed Computing¹¹ Environment [OSF] +
Distributed Computing Equipment
DCED Distributed Computing Environment Daemon
DCF Data Communication Facility [IBM] +
Data Compression Facility +
Data Count Field [IBM] +
Driver Configuration¹² File [Lotus]
D-CHANNEL Data Channel
DCI Display Control Interface
DCL Data Control Language + Declaration +
DEC Command Language [DEC] +
Device Clear + Digital Control Logic¹³ +
Digital Command Language [Digital]
DCOM Distributed Component¹⁴ Object Model
DCP Digital Light Processing [TI]
DCS Data Collection System + Data Control System +
Desk Color Separation + Distributed Control System
DCT Discrete¹⁵ Cosine Transform
.DCT Dictionary (file name extension)
DCU Data-Cache Unit
DD Day + Digital Display + Double Density¹⁶
DDA Distributed Data Access + Domain¹⁷-Defined Attribute
DDB Device Dependent Bitmap + Device Descriptor Block
DDC Digital Data Channel [VESA] + Display Data Channel
DDCMP Digital Data Communications Message Protocol [DEC]
DDC1 Display Data Channel One
DDCS Distributed Database Connection Services [IBM]
DDD Data Definition Language + Direct Distance Dialing
DDE Direct Data Entry + Dynamic Data Exchange [Microsoft]
DDEML Dynamic Data Exchange Manager Library [Microsoft]
DDF Display Data Channel + Dynamic Data Formatting¹⁸ [IBM]
DDI Device Driver Interface +
Digital document Interchange + Direct Dial In
DDK Device Driver Kit¹⁹ [Microsoft Windows]
DDL Data Definition Language + Data Description Language
DDM Distributed Data Management
DDN Defense²⁰ Data Network
DDNS Dynamic Domain Naming System
DDP Datagram Delivery Protocol +
Distributed Data Processing
DDR Dynamic document Review [Symantec]
DDR-SDRAM Double Data Rate-SDRAM
DDS Data Description Specification²¹ +
Digital Dataphone Service [AT&T] + Design Data Sheet +
Digital Data Storage + Distributed Database Services
DDX Digital Data Exchange
DE Device End
DEA Data Encryption Algorithm
DEC Decrement + Device Clear + Digital Equipment Corporation
DECNET Digital Equipment Corporation Networking (protocol)
DEF Desk Functional²² Equivalent [Compaq]
.DEF Definitions + Defaults (file name extensions)
DEFRAG Defragment
DEK Data Encryption Key
DEL Delete
DELSTR Delete String [REXX]
.DEM Demonstration²³ (file name extension)
DEN document Enabled Networking [Novell-Xerox]
DER Distinguished²⁴ Encoding Rules
DES Data Encryption Standard + Data Entry Sheet
.DES Description (file name extension)
DET Device Execute Trigger
DEV Device
DF Data Field + Destination Field + Device Flag +
Double Flag
DFC Data Flow Control
DFDR Digital Flight Data Recorder
DFM Design For Manufacturability [IBM]
DFP Digital Flat Panel
DFS Distributed File System
DFSMS Data Facility Storage Management Subsystem [IBM]
DFT Design For Testability + Diagnostic Function Test +
Discrete Fourier Transform +
Distributed Function Terminal
DFU Data File Utility
DGIS Direct Graphics²⁵ Interface Standard
DHCP Dynamic Host Configuration Protocol
DHL Dynamic Head Loading
.DHP Dr. Halo PIC (file name extension)
DHTML Dynamic HTML
DI Data In + Destination Index
DIA document Interchange Architecture [IBM]
DIB Device Independent Bitmap +
Directory Information Base +
Dual Independent Bus [Intel]
DIBOL DEC Business Oriented Language
.DIC Dictionary (file name extension)
DID Direct Inward Dialing
DIDS Distributed Intrusion Detection System
DIF Data Interchange Format¹⁰
DIFFSENS Differential Sense
DIIP Direct Interrupt Identification Port
DIMM Dual In-Line Memory Module
DIN Deutsche Industrie Norm (German equivalent of EIA)
DIO Data Input-Output
DIP Dialup Internet Protocol [Internet] +
Digital Imaging Processing +
Dual In-line Package + Dual In-line Pin
DIR Directory (file)
DIS Draft International Standard +
Dynamic Impedance Stabilization²⁶ [CompuCom]
DISA Data Interchange Standards Association +
Direct Inward System Access
DISP Displacement²⁷ (offset)
DIT Directory Information Tree
DIV Divide
DIVE Direct Interface Video Extension [OS/2 Warp]
DIVX Digital Video Express
DIW D-Inside Wire [AT&T]
.DIZ Description In Zip (file name extension)
DL Download (also D/L)
DL/1 Data Manipulation Language 1 [IBM]
DLC Data Link Control (protocol) [IBM] +
Distributed Loop Carrier
DLCI Data Link Connection Identifier
DLD Display List Driver
DLE Data Link Escape
DLL Dynamic Link Library
DLM Distributed Lock Manager + Dynamic Link Module
DLP Digital Light Processing [TI]
DLR DOS LAN Requester
DLS Data Link Switching [IBM]
DLT Digital Linear Tape
DM Distributed Memory
DMA Direct Memory Access/Addressing +
document Management Alliance
DMAC DMA Controller
DMACS Distributed Manufacturing Automation & Control Software
DMD Digital Micromirror Device [TI]
DME Direct Memory Execution +
Distributed Management Environment
DMF Distribution Media Format [Microsoft]
DMI Desk Management Interface
DML Data Manipulation Language
DMM Digital Multimeter
DMMS Dynamic Memory Management System
DMOS Double-diffused Metal-Oxide Semiconductor
DMP Dot Matrix Printer
DMPC Distributed Memory Parallel Computer
DMPP Distributed Memory Parallel Processor
DMQS Display Mode Query²⁸ and Set [IBM]
DMS Data Management Software + Data/document
Management System
DMSD Digital Multistandard Decoding
DMSS Distributed Mass Storage System
DMT Digital/Discrete Multi-Tone
DMTF Desk Management Task Force
DMY Day Month Year
DN Down
DNC Direct Numerical Control
DNIC Data Network Identification Code
DNIS Dialed Number Identification Service
DNS Domain Naming System
DO Data Out + Distributed Objects
.DOC document + documentation (file name extensions)
DOCSV Data Over Circuit-Switched Voice
DOE Distributed Objects Everywhere
DOIP Dial Other Internet Providers [IBM]
DO-IT Disabilities, Opportunities, Internetworking and
Technology
DOM document Object Model
DOMF Distributed Object Management Facility
DOS Disk Operating System
DOSEM DOS Emulation²⁹
DOV Data Over Voice
DOW Day Of Week
DP Data Processing
DPA Demand Protocol Architecture [3Com] +
document Printing Architecture
DPAM Demand Priority Access Method
DPAREN Data Parity³⁰ Enable [IBM]
DPB Drive Parameter³¹ Block
DPC Direct Program Control
DPI Distributed Protocol Interface + Dots Per Inch
DPL Descriptor Privilege Level
DPM Digital Panel Meter
DPMA Data Processing Management Association
DPMI DOS Protected Mode Interface [Microsoft]
DPMS Display Power Management Support
DPO Data Phase Optimization
DPS document Processing System
DPSK Differential Phase Shift Keying
DPtoTP Display Coordinates³² to Tablet Coordinates
(converting)
DQDB Distributed Queue Dual Bus
DQL Data Query Language
DR Data Received
D/R Direct or Reverse
DRAM Dynamic Random³³ Access Memory
DRAW Direct Read After Write
DR.BOND Dial-up Router Bandwidth On Demand [NEC]
DRDA Distributed Relational Database
  Algorithm/Architecture [IBM]
DR-DOS Digital Research-Disk Operating System
DRDW Direct Read During Write
DRI Digital Research Incorporated
DRM Distributed Resource Management
DRO Data Request Output + Destructive Read-Out
DRS document Registration³⁴ System
.DRS Driver Resource (file name extension) [WordPerfect]
DRV Drive
.DRV Device Driver (file name extension) (Also see .DVR)
.DRW Draw + Drawing (file name extensions)
DS Data Segment + Data Send + Data Server + Double Sided
D/S Dhrystone Per Second
DSA Digital Signature Algorithm + Directory System Agent
DSAP Destination Service Access Point
DSD Direct Stream Digital [Sony-Philips]
DSDD Double Sided, Double Density (diskette)
DSE Data Storage Equipment
DSEA Display Station Emulation Adapter
DSECT Dummy³⁵ Control Section
DSHD Double Sided, High Density (diskette)
DSIS Distributed Support Information Standard
DSL Digital Subscriber³⁶ Line +
Dynamic Simulation Language
DSLAM Digital Subscriber Line Access Multiplexer
DSM Distributed Shared Memory
DSMA Digital Sense Multiple Access
DSN Delivery Service Notification
DSOM Distributed System Object Model
DSP Digital Signal Processing/Processor +
Directory Synchronization³⁷ Protocol [Lotus]
DSPT Display Station Pass-Thru [IBM]
DSQD Double Sided, Quad³⁸ Density (diskette)
DSR Data Set Ready + Device Status Register +
Device Status Report
DSS Decision Support System + Digital Signature Standard +
Direct Station Selector
DSSI Digital Standard Systems Interconnect [DEC]
DSSS Direct-Sequencing Spread Spectrum
DSSSL document Style Semantics and Specifications³⁹ Language
DSTN Double Supertwisted Nematic
DSU Data Service/Switching Unit + Digital Service Unit
DSVD Digital Simultaneous Voice and Data
DSW Data Status Word + Device Status Word
DSX Digital Signals Cross-Connect
D2T2 Dye Diffusion⁴⁰ Thermal⁴¹ Transfer (printing)
DTA Disk Transfer Area
.DTA Data (file name extension)
DTC Desk Conferencing
DTD document Type Definition
DTE Data Terminal Equipment + Dumb Terminal Emulator
DTF Distributed Test Facility
DTL Dialogue Tag Language [IBM] + Diode-Transistor Logic
DTM Digital Terrain⁴² Mapping
DTMF Data Tone Multiple Frequency + Dual Tone Multifrequency
DTP Desk Publishing + Distributed Transaction Process
DTR Data Terminal Ready + Data Transfer Rate
DTSS Dartmouth Time Sharing System
DTV Desk Video + Digital Television
DTVC Desk Video Conferencing
DU Disk Usage
DUA Directory User Agent
DUAT Direct User Access Terminal
DUN Dial-Up Networking [Microsoft]
DUNCE Dial Up Network Connection Enhancement
DV Digital Video
.DV DESQview script (file name extension)
DVC Desk Video Conferencing + Digital Video Camera
DVD Digital Video Disk
DVD-R Digital Video Disk-Recordable
DVD-RAM Digital Versatile⁴³ Disc-RAM
DVD-ROM Digital Versatile Disc-ROM
DVE Digital Video Effect
DVI Digital Video Interactive⁴⁴ + Digital Visual Interface
.DVI Device Independent (file name extension)
DVM Digital Volt⁴⁵ Meter
DVMRP Distance Vector Multicast Routing Protocol [Internet]
DVR Digital Video Recorder
.DVR Device Driver (file name extension) (Also see .DRV)
DW Data Warehousing
DWDM Dense⁴⁶ Wavelength⁴⁷ Division Multiplexer
DWG Drawing
DWMT Discrete Wavelet Multitone
D2X Decimal To Hexadecimal [REXX]
.DXB Drawing Interchange Binary (file name extension)
[AutoCAD]
DXC Data Exchange Control
DXF Drawing Exchange Format
DXI Data Exchange Interface
DYNSRC Dynamic Source

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