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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
| D/U | Desired to Undesired [signal] Radios |
| DA | Direct Access |
| DA | Directional Antenna |
| DA | Distribution Amplifier |
| DAB | Digital Audio Broadcasting (see also DRB & DSB) |
| DAC | Digital-to-Audio Converter/Conversion |
| DAD | Digital Audio Disc (same as Compact Disc) |
| DAD | Telephone Answering Device |
| DAF | Demographic Adjustment Factor |
| DAMA | Demand Assigned Multiple Access |
| DAP | Digital Audio Processing/Processor |
| DAP | Digital Acoustics Processor |
| DAR | Digital Audio Radio |
| DAR | Digital Audio Recorder/Recording |
| DARC | DAta Radio Channel (FM Digital Subcarrier System) |
| DARS | Digital Audio Radio Services |
| DAS | Data Acquistion System |
| DASH | Digital Audio Stationary Head Tape Recorder |
| DAT | Digital Audio Tape/Technology |
| DATS | Digital Audio Transmission Service |
| DATV | Digitally Assisted Television |
| DAVIC | Digital Audio-Visual Council |
| DAVICJ | DAVIC Japan |
| DAVID | Digital Audio-Video Interactive Decoder |
| DAWS | Digital Audio Work Station |
| DB | Delayed Broadcast |
| DB | Decibel - logarithmic ratio values (abbrev. "dB") |
| DB | DataBase |
| DBA | Daytime Broadcasters Association (disbanded) |
| DBB | Distributed Binary Bits |
| DBC | Decibels (reference to carrier level) |
| DBF | Decibels (referenced to 1 femtowatt) |
| DBI | Decibels relative to Isotropic Antenna |
| DBK | Decibels (referenced to 1 kilowatt) |
| DBM | Decibels (reference to 1 milliwatt) |
| DBN | Digital Block Number |
| DBS | Direct Broadcast Satellite/Service |
| DBSA | Direct Broadcast Satellite Association (now SBCA) |
| DBU | Decibels (referenced to 1 microwatt) |
| DBV | Decibels (referenced to 1 volt) |
| DBW | Decibels (referenced to 1 watt) |
| DBW/HZ | Decibels Relative to 1 Watt per Hertz |
| DBW/M2 | Decibels relative to 1 Watt per Square Meter |
| DBW/M2/HZ | Decibels Referenced to 1 Watt per Square Meter per Hertz |
| DC | Data Count (in digital data stream) |
| DC | Direct Current |
| DCC | Digital Compact Cassette (consumer recording system) |
| DCCD | Digital Charged Coupled Device |
| DCDC | Desired Characteristics and Decision Criteria |
| DCDM | Digitally Controlled Delta Modulation |
| DCFL | Direct Coupled Field Effect (transistor) Logic |
| DCL | Digital Composite Limiter |
| DCPM | Differential Pulse Code Modulation |
| DCPSK | Differential Coherent Phase Shift Keying |
| DCR | Digital Cable Radio |
| DCS | Digital Command Signal |
| DCT | Discrete Cosine Transform (used in video digital compression |
| DCTV | Digital Color Television |
| DDA | Digital Differential Analyzer |
| DDD | Direct (Long) Distance Dialing |
| DDR | Digital Disk Recorder |
| DDS | Digital Data Service/System |
| DDS | Direct Digital Synthesis |
| DE | Director of Engineering |
| DEDS | Digital Error Detection System |
| DEMS | Digital Electronic Message Service |
| DEMUX | Demultiplexer |
| DES | Digital Encryption Standard |
| DES | Digital Encryption Standard |
| DES | Digital Echo Suppressor |
| DESC | Defence Electronic Supply Center |
| DF | Delivery Function [Intercept] |
| DFD | Digital Frequency Discriminator |
| DFFMS | Digital Feedback Frequency Modulation System |
| DFM | Digital Frequency Meter |
| DFPS | Digital Ferrite Phase Shifter |
| DFT | Direct Fourier Transform |
| DFTC | Drop-Frame Time Code |
| DGA | Directors Guild of America |
| DGPS | Differential Global Positioning System |
| DHCP | Dynamic Host Configuration Protocol |
| DI | Directivity Index (of Loudspeakers) |
| DID | Digital Idenification [word] (in digital data stream) |
| DID | Digital Information Display |
| DID | Data IDentification |
| DIN | Deutsche Institut fur Normung (German Standards Institute) |
| DIP | Dual Inline Package integrated circuit assembly |
| DIS | Digital Identification Signal |
| DISCO | Domestic Intersatellite Coordination Organization |
| DITF | Disabilities Issues Task Force (FCC group) |
| DIVINE | Digital Video Narrow-band Emission |
| DJ | Disk Jockey (announcer for programs of recorded music) |
| DLC | Digital Logic Circuit |
| DLL | Dynamic Link Library (used in Personal Computer programs) |
| DLT | Digital Linear Tape |
| DLVA | Detector Log Video Amplifer |
| DM | Delta Modulation |
| DMA | Direct Memory Access (in computers) |
| DMA | Designated Market Area |
| DMA | Digital Manufacturers Alliance |
| DMC | Digital Micro Circuit |
| DMH | Data Message Handler |
| DMM | Digital Multimeter (used for servicing electronic equipment) |
| DMM | Direct Metal Master (for LP record manufacturing) |
| DMO | Demonstration Operation (for EAS operations) |
| DMS | Digital Multiplex System |
| DMSP | Defence Metorological Satellite Program |
| DMSP | Defense Meteorological Satellite Program |
| DMT | Discrete Multi-Tone |
| DN | Directory Number |
| DN | Digital Number |
| DNA | Digital Network Architecture |
| DNA | Data Not Available |
| DNI | Digital Network Interface |
| DO | Drift Oprbit (satellites) |
| DOC | Department of Commerce (USA) |
| DOC | Department of Communications (Canadian) |
| DOE | Department of Education |
| DOM | Digital Output Module |
| DOS | Denial of Service (in telephone systems) |
| DOS | Disk Operating System (in personal computers) |
| dpANS | Draft Proposed American National Standard |
| DPDT | Double Pole - Double Throw (switch) |
| DPS | Department of Public Safety |
| DPSK | Differential Phase Shift Keying |
| DPST | Double Pole - Single Throw (switch) |
| DQPSK | Differential Quadrature Phase Shift Keying |
| DRAM | Dynamic Random Access Memory (for computers) |
| DRAW | Direct Read After Write (optical data disk) |
| DRB | Digital Radio Broadcasting (see also DAB & DSB) |
| DRBC | Digital Radio Broadcasting Committee |
| DRC | Dynamic Range Control |
| DRFM | Digital Radio Frequency Memory |
| DRO | Dielectric Resonator Oscillator |
| DRRI | Digital Radio Research, Inc. (Canada) |
| DRRS | Digital Radio Relay System |
| DRS | Digital Reference Sequence |
| DRS | Data Relay Satellite |
| DSB | Double Sideband (used in AM broadcast service) |
| DSB | Digital Sound Broadcast (see also DAR & DRB) |
| DSB | Digital Storage Buffer |
| DSC | Digital Selective Calling |
| DSCQS | Double Stimulus Continuous Quality Scale |
| DSI | Detailed Spectrum Investigation (CEPT project) |
| DSK | Downstream Keyer |
| DSL | Digital Subscriber Line |
| DSMCC | Digital Storage Media Command & Control |
| DSN | Digital Switched Network |
| DSNG | Digital Satellite News Gathering |
| DSO | Digital Storage Oscilloscope |
| DSP | Digital Sound Program |
| DSP | Digital (audio) Signal Processing |
| DSR | Digital Satellite Radio |
| DSS | Digital Satellite System |
| DSS | Digital Subscriber Signaling (digital network systems) |
| DSSS | Direct Sequence Spread Spectrum |
| DSU | Data Service Unit |
| DSVD | Digital Simultaneous Voice and Data Forum |
| DTC | Digital Television Camera |
| DTE | Data Terminal Equipment |
| DTE | Department of Telecommunications & Energy (state agency) |
| DTF | Distance to Fault |
| DTH | Direct to Home (satellite TV program services) |
| DTMF | Dual Tone Multiple Frequency (telephone tones for numbers) |
| DTS | Digital Trunk Signaling (digital network systems) |
| DTS | Digital Test Sequence/Signal |
| DTT | Digital Terrestrial Transmission |
| DTTB | Digital Terrestrial Television Broadcasting |
| DTTR | Digital Television Tape Recorder |
| DTTV | Digital Terrestrial Television |
| DTV | Digital Television |
| DTVM | Digital Television Monitor |
| DUT | Device Under Test |
| DVB | Digital Video Broadcasting |
| DVCR | Digital View Cassette Recorder |
| DVD | Digital Video Disc |
| DVE | Digital Video Effects/Editing |
| DVM | Digital Volt Meter |
| DVN | Digital Video Network |
| DVOM | Digital Volt-Ohm Meter |
| DVS | Descriptive Video Service |
| DVTR | Digital Video Television Recorder |
| DW | Deutsche Welle (German International Broadcast Service) |
| DWC | Digital Wireless Communications |
| DWDM | Dense Wavelength Division Multiplex(ing) |
| DWF | Drawing Web Format (Used in WWW documents) |
| DX | Long Distance Communications |