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D8PSK differential 8-phase-shift keying
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D-ATIS digital automatic terminal information service
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D-OTIS data link operational terminal service
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D-TAXI data link taxi clearance delivery
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D-TOC digital transfer of communications
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DA descent advisor
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DA design authority
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DA digital-to-analog
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DABS discrete addressable beacon system
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DAC digital-to-analog converters
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DADC digital air data computer
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DADS digital air data system
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DAISS digital airborne intercommunication switching system
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DAP digital service access product
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DAP direct action penetration
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DAP downlink aircraft parameter
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DAP download of aircraft parameter
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DAR data access recorder
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DARC direct access radar channel
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DARP dynamic aircraft route planning
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DARPA Defense Advanced Research Projects Agency (U.S.)
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DAS designated alteration station
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DAS digital audio subcommittee
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DAS distributed aperture system
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DASS defensive aids sub-system
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DB database
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dB decibel
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dBA dB adjusted
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DBI downlink block identifier
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dBI dB referenced to an isotropic antenna
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dBI decibels above isotopic circular
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dBM dB below 1 milliwatt
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DBS direct broadcast satellite
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DBU database unit
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DBU dial backup
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dBW dB-watts or referenced to 1 watt
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DC direct current
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DC disconnect confirm
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DCAS digital control audio system
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DCD double channel duplex
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DCE data communications equipment
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DCGF data conversion gateway function
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DCL departure clearance (European)
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DCM digital coherent mute
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DCMF data communication management function
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DCMS data communication management system
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DCN document/drawing/design change notice
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DCP data communication process
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DCP display control panel
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DCS double channel simplex
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DCU data concentration unit
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DCV directional control valve
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DD data delivery
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DDA digital differential analyzer
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DDD dual disk drive
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DDM difference in depth of modulation
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DDP declarations of design and performance
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DDR draft document review
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DDR double data rate
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DDRMI digital distance radio magnetic indicator
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DDS direct digital synthesizer
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DDT downlink data transfer
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DER designated engineering representative
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DERA Defense Research and Evaluation Agency (U.K.)
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DEU display electronics unit
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DF direction finding
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DFA direction finding antenna
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DFCS digital flight control system
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DFDAF digital flight data acquisition function
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DFDAMU digital flight data acquisition management unit
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DFDAU digital flight data acquisition unit
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DFDR digital flight data recorder
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DFDU digital flight data unit
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DFGC digital flight guidance computer
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DFGS digital flight guidance system
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DFIDU dual function interactive display unit
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DFIU digital flight instrument unit
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DFS Deutsche Flugsicherung GmbH (Germany)
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DFS digital frequency select
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DfT Department for Transport (U.K.)
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DFU digital function unit
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DG directional gyro
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DGNSS differential global navigation satellite system
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DGPS differential global positioning system
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DH decision height
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DHCP dynamic host configuration protocol
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DHS Department of Homeland Security
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DI data interrupt
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DIFAX digital facsimile
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DIGNU deeply integrated guidance and navigation unit
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DIP data interrupt program
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DIP dual in-line package
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DIR director
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DIRCM direct infrared countermeasures
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DIR/INTC direct intercept
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DISA Defense Information Systems Agency (U.S.)
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DISC disconnect
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DISCH discharge
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DIST distance
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DITS data information transfer system
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DL data link
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DLAP data link application processor
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DLC data link control
-
DLCI data link control identifier
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DLE data link entity
-
DLK data link (AEEC)
-
DLL data link layer
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DLM data link management unit
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DLME data link and message engineering
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DL/MSU data loader/mass storage unit
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DLNA diplexer/low-noise amplifier
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DLORT data link operational requirements team
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DLP data link processor
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DLS data link service/system
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DLU download unit
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DM disconnected mode
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DMA direct memory access
-
DMD digital memory device
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DME distance measuring equipment
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DME/N DME normal
-
DME/P DME precision
-
DMM data memory module
-
DMS data link management system
-
DMS debris monitoring sensor
-
DMU data management unit
-
DoD Department of Defense (U.S.)
-
DoT Department of Transportation (U.S.)
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DOTS dynamic ocean tracking system
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DPI dots per inch
-
DPR dual port RAM
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DPSK differential phase shift keying
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DR dead reckoning
-
DR deduced reckoning
-
DRAM dynamic random access memory
-
DRER designated radio engineering representative (FAA)
-
DRN document release notice
-
DRVSM domestic reduced vertical separation minimum
-
DSAD digital service access device
-
DSARC defense system acquisition review cycle
-
DSB double side band
-
DSB-AM DSB-amplitude modulation
-
DSDU data signal display unit
-
DSF display system function
-
DSP data link service provider
-
DSP departure sequencing program
-
DSP digital signal processor
-
DSP display select panel
-
DSP domain specific part
-
DSPDRV display driver
-
DSR display system replacement
-
DSS decision support services
-
DSU data signaling unit
-
DT&E development test and evaluation
-
DTD data terminal display
-
DTD document type definition
-
DTE data terminal equipment
-
DTED digital terrain evaluation data
-
DTG distance-to-go
-
DTM demonstration test milestone
-
DTMF dual tone multifrequency (telephone)
-
DTP distributed targeting processor
-
DTPDU data protocol data unit
-
DTRS data transceiver router server
-
DTS digital theatre systems
-
DTU data transfer unit
-
DU display unit
-
DUAT direct user access terminal
-
DUATS direct user access terminal system
-
DUST dual-use science and technology
-
DVF demonstration and validation facility
-
DVM digital voltmeter
-
DVMC digital video map computer
-
DVOR Doppler very high frequency omnidirectional range
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DVRS digital voice recorder system
