Did you ever wonder what those strange conglomerations of letters meant? Here's your chance to find out what those NASA acronyms stand for. About Space and Astronomy presents the Guide to NASA Acronyms. From Data Acquisition to Design Baseline - Data Bus Control to Design Verification Testing, you'll find them all here.  This page lists acronyms starting with D. For others, click on the appropriate letter above or below.

[D]

dB: Decibel
dP/dT: Delta pressure/delta time
dc: DCAS Data Collection and Analysis System
dc: DCAR Design Corrective Action Report
dc: Defense Contract Administration Services
dc: DCAA Defense Contract Audit Agency
dc: Design Change Authorization
dc: Digital Command Assembly
dc: DCA Defense Communication Agency
dc: Direct Current
dc: Distribution Control Assembly
D: Deck
D: Drag
D: Down
D: Delta
D: Deliver (Delivery)
D LSC: DLTR Data Link Terminal Repeater
D LSC: DLSM Data Link Summary Message
D LSC: Defense Logistics Service Center
D LSC: Data Link Transmission Repeater
D&C: DisplaY and Control (C&D preferred)
D&C: Displays and controls
D&CS: Display and Controls Subsystem
D&O: DescriPtion and Operations
D&P: Drain and Purge
D/A: Digital to Analog
D/C: DisplaYs/Controls
D/L: Deorbit/Landing
D/L: Data Link
D/L: Downlist
D/L: Downlink
D/VD: Data/Voice Data
DA: Distribution Assembly
DA: Double AmPlitude
DA: Data Acquisition
DA: Deployment Assembly
DA: Distribution assembly
DA: Deployed assembly
DA&D: Data Acquisition and Distribution
DAB: Data Acquisition Bus
DABS: Discrete Address Beacon SYstem
DAC: Data Acquisition and Control
DAC: Data Acquisition Camera
DAC: Digital to Analog Converter
DAC: Digital to AnalYtical Conversion
DACB: Data Acquisition and Control Buffer
DACBU: Data Acquisition and Control Buffer Unit
DACS: Digital Acquisition and Control System
DACS: Data Acquisition and Control System
DACT: DisPosable Absorption Collection Trunk
DADE: Data Acquisition and Decommutation EquiPment
DADS: Dual Air Density Satellite
DAE: Data Acquisition EquiPment
DAF: Data Acquisition Facility
DAF: Data Analysis Facility
DAFT: Data Acquisition Frequency Table
DAIS: Data Avionics Information System
DAL: Data Acquisition List
DAL: Data Accession List
DAL: Data Aided Loop
DAM: Double Aluminized Mylar
DAM: Driver Amplifier Module
DAP: Data Acquisition Plan
DAP: Digital Autopilot
DAP: Digital autopilot
DAR: Data Aided Receiver
DAR: Digital Autopilot Requirements
DAR: Deviation Approval Request
DAR: Drawing Analysis Record
DARS: Data Acquisition and Reduction System
DARTS: Digital Automated Radar Tracking System
DAS: Documentation Accountability Sheet
DAS: Digital Avionics System
DAS: Digital Address System
DAS: Data Analysis Station
DAS: Data Acquisition System
DASA: Dual Aerosurface Servo Amplifier
DATE: "Dynamics, Acoustics, and Thermal Environment"
DAU: Digital Adapter Unit
DAU: Data Acquisition Unit
DAV: Data Available
DAV L: Data Available-Low
DB: Deadband
DB: Data Base
DB: Data Bus
DB: Dry Bulb
DB: Distribution Box
DB: Design Baseline
DBC: Data Bus Coupler
DBC: Data Bus Control
DBC: Data bus coupler
DBCI: DB with Respect to a Circular Polarized Antenna
DBE: Data Bus Element
DBFN: Data Bus File Number
DBFN: Data Base File Number
DBFN: DBG Data Bus Group
DBGMP: DBL Double
DBGMP: Data Bus Generation and Maintenance Package
DBGMP: Data Bus Isolation Amplifier
DBGMP: DBIA Data Bus Interface Adapter
DBGMP: DBI Data Bus Interface Unit-Launch
DBGMP: DBIU Data Bus Interface Unit
DBGMP: DBS Data Base System
DBGMP: dBM Decibels Referred to I Milliwatt
DBGMP: DBN Data Bus Network
DBGMP: DBP Design Baseline Program
DBGMP: DBRN Data Bank Release Notice
DBGMP: DBM Data Base Management
DBGMP: dBW Decibels Referred to I Watt
DBGMP: DBW Data Bus Wire
DBGMP: DBUR Data Bank Update Request
DBIA: Data bus isolation amplifier
DBN: Data bus network
DC: DeveloPment-Center
DC: Data Coordinator
DC: Display Coupler
DCC: Data ComPutation Complex
DCC: Display COMPuter Control Unit
DCC: Document Control Center
DCC: Digital Communications and Control Unit
DCC: DCCU Digital Command and Control Unit
DCC: Data computation complex (JSC)
DCIB: Data Communication InPut Buffer
DCIM/DSCIM: Display SYstem Computer Input Multiplexer
DCIU: Digital Control and Interface Unit
DCKNG: Docking
DCL: Document Change List
DCM: Direction Cosine Matrix
DCM: DECOM Control Memory
DCM: Display and Control Module
DCM: Display and control module
DCMB: Development Configuration Management Board
DCN: Design Change Notice
DCN: Document Change Notice
DCN: Drawing Change Notice
DCNP: Document Change Notice Proposal
DCO: Detailed Checkout
DCOP: Detailed Checkout Procedures
DCOP: "Displays, Controls, and Operations Procedures"
DCP: Data Collection Platform
DCP: Depot Condemnation Percent
DCP: DEU Control Program
DCP: Development Cost Plan
DCPEI: DEU Control Program End Item
DCR: Design Change Request
DCR: Design Certification Review
DCR: Document Change Record (or Review)
DCR: Design Concern Report
DCS: Data Communication System
DCS: Design Criteria Specification
DCS: Design Communication System
DCS: Detail Checkout Specification(s)
DCS: Digital Command System (Subsystem)
DCS: Display and Control System
DCS: Document Control System
DCS: Dual Checkout Station
DCS: Data Control System
DCSI: Data and Cqntrol Signal Interface
DCSP: Digital Control Signal Processor
DCSU: Digital Computer Switching Unit
DCU: Digital Computer Unit
DCU: Display and Control Unit
DCV: Direct Current Volts
DD: Data Depository
DD: Mechanical and Facilities Engineering (KSC DE Dir.)
DD: Directives Documentation
DD: Dedicated Displays
DD: Data Display
DD: Decoder Driver
DD&CS: Dedicated Display and Control Subsystem
DD/HH:MM:SS: Day/Hour:Minute:Second
DDA: Digital Differential Analyzer
DDA: ICD Departure Authorization
DDAS: Digital Data Acquisition System
DDC: Defense Documentation Center
DDC: Data Distribution Center
DDC: Digital Data Cell
DDD: Display Decoder Drive
DDD: Design Definition Document
DDDL: Digital Data Downlink
DDDU: Digital Decoder Driver Unit
DDI: Dedicated Display Indicator
DDI: Discrete Data input
DDI: Discrete Digital Input
DDIS: Data Depository Index System
DDL: Data Downlink
DDM: Data Display Module
DDM: Data Display Monitoring
DDM: Discrete Data Management
DDMS: DOD Manager for Space Shuttle Support
DDO: Discrete Digital Output
DDP: Design Development Plan
DDP: Digital Data Processing (Processor)
DDPC: Digital Data Processing Center (Complex)
DDPF: Dedicated Display Processing Function
DDPS: Digital Data Processing System
DDR: Data Discrepancy Report
DDR: Design Development Record
DDR: Detail Design Review
DDS: Documentation Distribution System
DDS: Data Display System
DDS: Detailed Design Specification
DDT&E: "Design, Development, Test, and Engineering/Evaluatio"
DDT&E: "Design, Development, Test, and Evaluation"
DDT&E: "Design, development, test and evaluation"
DDTF: Dynamic Docking Test Facility
DDTS: Dynamic Docking Test System
DDU: Decommutator Distribution Unit
DDU: Data Display Unit
DDU: Display Driver Unit
DDU: Display driver unit
DE: Design Engineering (KSC Dir.)
DE: Doppler Extractor
DE: Dynamics Explorer
DEA: Deployed electronics assembly
DEACT: Deactivate
DEC: Declination
DECL: Direct Energy Conversion Laboratory (JSC)
DECOM: "Decommutate, Decommutator"
DECR: Decrease
DECS: Civil Engineering Office at Vandenberg
DECU: Data Exchange Control Unit
DED: "Dedicate, Dedicated"
DEDA: Data Entry and Display Assembly
DEE: Digital Events Evaluator
DEF: Definition
DEFL: Deflect
DEG: Degree
DEI: Design Engineering Identification
DEIS: Design Engineering Inspection Simulation
DEIS: Design Evaluation Inspection Simulator
DEL: "Deliver, Delivery"
DEL: "Deorbit, Entry, and Landing"
DELTA-T: Difference in Temperature
DEMOD: "Demodulate, Demodulator"
DEMUX: Demultiplexer
DEORB: Deorbit
DEPL: Deploy
DEPRESS: Depressurize
DEPT: Department
DER: Drawing Error Report
DERIGID: Derigidize
DES: Data Exchange System
DES: "Descend, Descent"
DESAT: Desaturated
DESC: Descent
DESIG: Designate
DESPOT: Design Performance OPtimization
DEST: Destination
DET: Detent
DET: Detail
DETN: Detection
DETR: Detector
DEU: Display Electronic(s) Unit
DEU: Display electronics unit
DEV: "Develop, Development"
DEVN: Deviation
DEW: Distant Early Warning
DF: Direction Finder (Finding)
DF: Disassembly Facility
DF: Development-Forward
DF: Development Flight
DF: Display Functions
DF-SPE-A: Shuttle Project Engineering Office
DFCS: Digital Flight Control Software (System)
DFE: Data Flow Engineer
DFE: Direction Finding Equipment
DFG: Display Format Generator
DFI: Development Flight Instrumentation
DFI: Development flight instrumentation
DFR: Defrost
DFRC: Hugh L. Dryden Flight Research Center
DFRF: Dryden Flight Research Facility
DFRN: Differential
DFRN PRESS: Differential Pressure
DFS: Directional Finding System
DFS: Dynamic Flight Simulator
DFVLR: Deutsche Forschungs-und Versuchsanstalt Luft-u
DG: Display Generator
DH: Decision Height
DHA: Design Hazards Analysis
DHE: Data-handling equipment
DHS: Discrete Horizon Sensor
DI: Display Interface Processor (Software Functional Element)
DI: Display Interface
DI: Discrete Input
DI: Development Integration
DI: Data Integrator
DIA: Diameter
DIAG: Diagonal
DIAGN: Diagnose
DIDS: Defense Integrated Data System
DIF: Discrete Increment Filter
DIF: Difference
DIFF: Differential
DIGI: Digital
DIH: Discrate Input High
DIH: Discrete Input High
DIL: Deliverable Items List
DIL: Discrete Input Low
DIM: Design Interface Meeting
DIMEN: Dimension
DIP: Designated Inspection Point
DIP: Display Input Processor
DIP: Display Interface Processing (Processor)
DIPEC: Defense Industrial Plant Equipment Center
DIPL: Display Initial Program Load
DIR: Direct
DIR: Document Information Record
DIS: Documentation Index System
DIS: Disagree
DISAP: Disapproved
DISASSY: Disassembly
DISC: Discone
DISC: Disconnect
DISC: Discrete
DISCH: Discharge
DISENG: Disengage
DISP: Dispenser
DISP: Display
DIST: Distribution
DISTR: DIU Dynamic Integrated Test
DISTR: Digital Interface Unit
DISTR: DIV Division
DISTR: DIT Data ld Table
DISTR: Distributor
DK: Docking
DK: DisplaY/Keyboard
DK: Deck
DK: Display keyboard
DL: Downlink
DL: DeveloPment-Left
DL: Electronics Engineering (KSC DE Dir.)
DLAT: Destructive Lot AccePtance Testing
DLC: Direct Lift Control
DLS: Dynamic Load Simulator
DLY: Delay
DM: Docking Mechanism
DM: "Document, Documentation"
DM: Disassembly Manual
DM: DeveloPmental Instrumentation MDM.Mid
DM: DeveloPment Motor
DM: Data Manager
DMA: Direct MemorY Access
DMA: Direct MemorY Address
DMC: Drive Motor Assembly
DMC: Direct Maintenance Cost
DMC: Data Management ComPuter
DMCF: "Deservicing, Ma ntenan"
DME: Distance Measur ng EquiPment
DME: Distance-measuring equipment
DMG: Data Management Group
DMIA: Dual Multiplexer Interface Adapter
DMIS: Data Management Information System
DML: Developmental Instrumentation MDM-Left
DMON: Discrete Monitoring
DMP: Dump
DMP: DEU Message Processor
DMP: Deployable Maintenance Platform
DMR: Developmental Instrumentation MDM-Right
DMS: Data Management System
DMS: Docking Mechanism System (Subsystem)
DMS: Docking Module Subsystem
DMS: Dynamic Motion Simulator
DMSS: Data Management System Simulator (CVT)
DN: Down
DN: Discrepancy Notice
DNA: Does Not Apply
DNLK: Downlink (D/L preferred)
DNLT: Downlist
DNO: Descending Node Orbit
DNP: Dynamic Nuclear Polarization
DO: Discrete Output
DOA: DePartment of Agriculture
DOC: Department of Commerce
DOC: "Document, Documentation"
DOD: Department of Defense
DOD: Department of Defense
DOD-STP: Department of Defense-Standard Satellite
DODD: Department of Defense Directive
DOE: Department of Energy
DOF: Direction of Flight
DOF: Degree-of-Freedom
DOH: Discrete Output High
DOI: Descent Orbit Insertion
DOL: Department of Labor
DOL: Discrete Output Low
DOMSAT: Domestic Satellite
DOMSAT: Domestic satellite
DOP: Diver Operated Plug
DOS: Disk Operating System
DOSIM: Dosimeter
DOT: Department of Transportation
DOT: Deployment Operations Team
DOT/CIAP: DOT Climatic impact Assessment Program
DOY: Day of Year
DP: Double Precision
DP: Differential Pressure
DP: Development Phase
DP: Data Processing
DP: Double Pole
DP: Design Proof
DP: Deployable Payload
DP: Delayed Procurement
DP&S: Data Processi.ng And Software
DP&SS: Data Processing and Software Subsystem
DP/DT: Delta Pressure/Delta Time
DPA: Data Processing Assembly
DPA: Data processing assembly
DPI: Detail Program Interrelationships
DPLR: DOPPler
DPM: Dual port Memory
DPN L: Distribution Panel
DPP: Definition Phase Review
DPP: E)eve@opment-Right
DPP: Design Review
DPP: "Discrete Registe,"
DPP: Dispatch BeliabilitY
DPP: D'isposit'lon Record
DPP: Data Processing and Software
DPP: Deployment Pointing Panels
DPP: Door
DPP: Discrepancy R12POrt
DPP: Data Processing System (Subsystern)
DPP: Data Processing Software System
DPP: Data Requirements and AnalYsis
DPP: Drive
DPS: Data processing system
DPT: Design Proof Test
DPY: Deploy
DR: Dead Reckoning
DRA: Data Release Authorization
DRB: Design Review Board
DRB: Design Requirements Baseline
DRC: Data Reduction Center
DRC: Discrete Rate Command
DRD: Document Requirement Description
DRD: Data Requirement Description
DRD: Detailed Requirements Document
DRD: Data Requirements Document
DRF: Data Request Form
DRF: "Digital, Radio Frequency"
DRF: Documentation Requisition Form
DRG: Digital Ranging Generator
DRI: Data Rate Indicator
DRIRU: Dry Rotor Inertial Reference Unit
DRK: Display Request Keyboard
DRL: Data Requirements List
DRL: Document Requirements List
DRM: Data Records Management
DRM: Design Reference Mission
DRM: Drawing Requirements Manual
DRN: Drain
DRO: Document Release Order
DROG: Drogue
DRR: Design Requirements Review
DRR: Data Recorder/Reproducer
DRS: Digital Range Safety
DRS: Data Relay Satellite
DRS: Data Relay Station
DRSS: Discrepancy Report Squawk Sheet
DRT: Design Reference Timeline
DRUC: Disposition Record Unsatisfactory Condition
DS: Data Storage
DS& R: Data Storage and Retrieval
DSA: Defense Supply Agency
DSAD: Data Systems and Analysis Directorate (JSC)
DSB: Document Status Bulletin
DSB: Double Side Band
DSC: Data Separator Card
DSC: Dedicated signal conditioner
DSN: Deep-Space Network
DTP: Detail Test Plan
DTPR: Detailed Test Procedures
DTRD: Development Test Requirements Document
DTS: Data Transmission System
DTS: Data Transfer System
DU: Display Unit
DU: Display unit
DUA: Digital Uplink Assembly
DUC: Digital Uplink Command
DUM: Dummy
DUPLX: Duplex
DUPLXR: Duplexer
DUR: Duration
DV: Designated Verification
DV: Differential Velocity
DV: Designee for Verification
DVD: Delta Velocity Display
DVM: Digital Voltmeter
DVS: Design Verification Specification
DVS: Digital Voice System
DVT: Design Verification Testing
DW: Data Word
DWG: Drawing
DWI: Data Word in
DWS: Disaster Warning Satellite
DWV: Dielectric Withstanding Voltage
DY: Deputy Director (KSC Directorate)
DYN: Dynamic

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