| A | ampere |
| A | analog |
| A | analog signal |
| A&A | advertise and award |
| A&CO | activation and checkout |
| A&COTA | assembly and checkout technical analysis |
| A&E | architects and engineers |
| A&E | architectural and engineering |
| A&L | approach and landing |
| A&P | airframe and power plant |
| A&P | attitude and pointing |
| A&PS | Administration and Program Support (MSFC directorate) |
| A&R | assembly and recycle |
| A&R | automation and robotics |
| A&RC | application and resource control |
| A&S | alignment and stabilization |
| A&SS | alignment and stabilization subsystem |
| A&T | assembly and test |
| A&TA | assembly and test area |
| A-G | air-to-ground |
| A/A | air-to-air |
| A/A | airplane avionics |
| A/A | analog-to-analog |
| A/A | angular accelerometer |
| A/B | airborne |
| A/C | air conditioning |
| A/C | aircraft |
| A/C | associate contractor |
| A/D | analog-to-digital |
| A/F | air-to-fuel ratio |
| A/F | airframe |
| A/FM | arm firing mechanism |
| A/G | air-to-ground |
| A/J | antijam |
| A/L | airlock |
| A/L | approach and landing |
| A/L | autoland |
| A/M | area to mass |
| A/M | auto/manual |
| A/N | account name |
| A/N | alphanumeric |
| A/O | analog output |
| A/P | airport |
| A/P | autopilot |
| A/R | as required |
| A/R | autoland roll-out |
| A/S | acquisition sensor |
| A/S | airspeed |
| A/S | arm/safe |
| A/S | ascent stage |
| A/S | auxiliary stage |
| AA | American Airlines |
| AA | Associate of Arts degree |
| AA | accelerated assembly |
| AA | accelerometer assembly |
| AA | affirmative action |
| AA | air-to-air |
| AA | airplane avionics |
| AA | angular accelerometer |
| AA | antiaircraft |
| AA | associate administrator |
| AA/AL | airplane avionics/autoland |
| AA/AL | automatic approach/autoland |
| AAA | allocations, assessments, and analysis |
| AAA | astronaut-actuated abort |
| AABNCP | Advanced Airborne National Command Post |
| AACCS | analytical approach to candidate constellation selection |
| AACPSM | actual average cost per successful mission |
| AACS | attitude and antenna control system |
| AADEW | attack assessment for directed-energy weapon |
| AADR | applications approval design review |
| AADS | ascent air data system |
| AADSF | advanced automated directional solidification furnace |
| AAE | American Association of Engineers |
| AAE | abort advisory equipment |
| AAE | aerospace auxiliary equipment |
| AAFE | advanced applications flight equipment |
| AAIR | advanced atmospheric sounder and imaging radiometer |
| AAMP | advanced architecture microprocessor |
| AAMRAM | air-to-air medium-range missile |
| AAO | Astronaut Activities Office (JSC) |
| AAP | Affirmative Action Plan |
| AAP | Affirmative Action Program |
| AAP | airlock adapter plate |
| AAP | analog autopilot |
| AAP | assemble at pad |
| AAS | abort advisory system |
| AAS | advanced antenna system |
| AASM | Association of American Steel Manufacturers |
| AB | adapter booster |
| AB | afterburner |
| AB | air bearing |
| AB | airborne |
| AB | anchor bolt |
| AB | autobeacon |
| AB | avionics bay |
| ABA | dc amplifier, buffer, and attenuator |
| ABC | Ada browse capability |
| ABC | automatic brightness control |
| ABCAS | algorithm beam center and shape |
| ABCF | as-built configuration file |
| ABCL | as-built configuration list |
| ABCP | airborne command post |
| ABCR | as-built configuration record |
| ABD | Airborne Ballistics Division (NASA) |
| ABE | air-based electronics |
| ABE | air-breathing engine |
| ABE | arm-based electronics |
| ABERT | auto bit error rate test |
| ABES | air-breathing engine system |
| ABETS | airborne beacon test set |
| ABI | avionics bus interface |
| ABJIT | algorithm beam jitter |
| ABL | airborne laser |
| ABL | aircraft-based laser |
| ABLE | airborne laser evaluation |
| ABLOS | algorithm beam line of sight |
| ABM | acquisition bus monitor |
| ABM | advance bill of materials |
| ABM | antiballistic missile |
| ABM | apogee boost motor |
| ABMA | Army Ballistic Missile Agency |
| ABMCP | airborne military command post |
| ABMO | Antiballistic Missile Office |
| ABNCP | Airborne National Command Post |
| ABPS | air-breathing propulsion system |
| ABRES | antiballistic reentry system |
| ABS | air-break switch |
| ABS | ammonia boiler system (subsystem) |
| ABT | air-bearing table |
| ABTCU | active baseplate thermal control unit |
| AC | advanced composite |
| AC | aerodynamic center |
| AC | application controller |
| AC | assembly complete |
| AC | audio center |
| AC | auxiliary computer |
| ACA | Associate Contractor Administration |
| ACA | altitude controller assembly |
| ACA | annunciator control assembly |
| ACA | attitude controller assembly |
| ACA | auxiliary crew compartment |
| ACAP | Advanced Computer Airframe Program |
| ACB | air-cushion barge |
| ACC | advanced carbon-carbon |
| ACC | aft cargo compartment |
| ACC | automatic control console |
| ACC | auxiliary crew compartment |
| ACCE | augmented continuous control evaluator |
| ACCESS | assembly concept for construction of erectable space |
| ACCN | audit central control network |
| ACCS | adaptive communication control subsystem |
| ACCU | audio central control unit |
| ACD | accuracy control document |
| ACD | anti-carryover device |
| ACD | architectural control document |
| ACDA | Arms Control and Disarmament Agency |
| ACDNS | attitude control, determination, and navigation |
| ACDS | attitude control and determination system (subsystem) |
| ACE | acceptance checkout equipment |
| ACE | actual average cost per successful mission |
| ACE | attitude control electronics |
| ACE | automatic checkout equipment |
| ACEL | Air Crew Equipment Laboratory (U.S. Navy) |
| ACES | acceptance checkout and evaluation system |
| ACES | acceptance control equipment section |
| ACES | automatic checkout equipment sequencer |
| ACEU | aerocontrol electronics unit |
| ACF | American Car and Foundry |
| ACI | age-controlled item |
| ACI | allocated configuration identification |
| ACIL | automatic controlled instrument landing |
| ACIP | aerodynamic coefficient identification package |
| ACIP | aerodynamic coefficient instrumentation package |
| ACL | access control list |
| ACL | allowable container load |
| ACL | ascent closed loop |
| ACLC | adaptive communication live controller |
| ACLS | automated control and landing system |
| ACM | Association of Computing Machinery |
| ACM | acquisition control module |
| ACM | actual average cost per successful mission |
| ACM | auxiliary core memory |
| ACMA | Army class managing activity |
| ACMB | Applications Configuration Management Board |
| ACME | attitude control and maneuvering electronics |
| ACMS | automated configuration management system |
| ACN | Ascension Island (STDN) |
| ACN | acceptance change notice |
| ACO | acceptance checkout |
| ACO | administrative contracting officer |
| ACO | assembly checkout |
| ACP | airborne command post |
| ACP | astronaut control panel |
| ACP | audio control panel |
| ACPL | assembly component parts list |
| ACPM | associate contractor program manager |
| ACPM | attitude control propulsion motor |
| ACPO | Associate Contractor Project Office |
| ACPS | attitude control propulsion system |
| ACR | actual cost report |
| ACRC | assured crew return capability |
| ACRES | automated change request and evaluation system |
| ACRIM | active cavity radiometer irradiance monitor |
| ACRS | Advisory Committee on Reactor Safeguards |
| ACRS | accelerated cost recovery system |
| ACRV | assured crew return vehicle |
| ACS | American Chemical Society |
| ACS | advanced combat system |
| ACS | aft crew station |
| ACS | alternating current synchronous |
| ACS | altitude control and stabilization |
| ACS | atmosphere control system |
| ACS | attitude control and stabilization |
| ACS | attitude control system |
| ACS | automated control system |
| ACSN | advance change schedule notice |
| ACSN | advance change/study notice |
| ACSU | alternating-current switching unit |
| ACT | acquisition coarse tracker |
| ACT | acquisition, control, and test |
| ACT | audio center transmission |
| ACTA | activate test article |
| ACTS | acquisition coarse tracker subsystem |
| ACTS | advanced communication technology satellite |
| ACU | annunciator control unit |
| ACU | avionics cooling unit |
| ACUO | avionics cooling unit operator |
| ACV | air-cushion vehicle |
| ACWP | actual cost for work performed |
| AD | Administrative Operations and Support Service (KSC |
| AD | advanced development |
| AD | air density |
| AD | associate director |
| ADA | adaptive diagnostic authoring |
| ADA | azimuth drive assembly |
| ADABECS | airborne demonstration advanced beam extraction am |
| ADAC | attitude determination and control |
| ADACS | attitude determination and control system |
| ADADL | Ada design and documentation language |
| ADAES | advanced data assessment expert system |
| ADAM | automated distributed architecture model |
| ADAMS | automated dynamic analysis of mechanical systems |
| ADAP | aerodynamic data analysis program |
| ADAP | automated data analysis program |
| ADB | Aerodynamic Data Book |
| ADB | auxiliary memory data output bus |
| ADC | Aerospace Defense Command |
| ADC | Air Defense Command |
| ADC | air data computer |
| ADC | analog-to-digital computer |
| ADC | analog-to-digital converter |
| ADC | attitude determination and control |
| ADCN | attitude determination, control, and navigation |
| ADCOM | air defense command |
| ADCR | applicable document contractual record |
| ADCS | attitude determinate control system |
| ADCS | attitude determination and control subsystem |
| ADD | architecture definition document |
| ADF | automatic direction finder |
| ADF | automatic display finder |
| ADFRF | Ames/Dryden Flight Research Facility |
| ADH | advanced development hardware |
| ADI | analytic and design investigation |
| ADI | attitude direction indicator |
| ADI | attitude director indicator |
| ADI | attitude display indicator |
| ADIC | Air Defense Intelligence Center |
| ADL | Ada design language |
| ADL | Ada-based design language |
| ADL | Advanced Development Laboratory |
| ADL | Avionics Development Laboratory |
| ADM | air data management |
| ADMS | automated data management system |
| ADOP | advanced distributed on-board processor |
| ADP | Advanced Development Program (NASA) |
| ADP | acceptance data package |
| ADP | acceptance documentation package |
| ADP | air data package |
| ADP | air data probe |
| ADP | automated data processing |
| ADP | automatic data processing |
| ADPA | air data probe assembly |
| ADPE | automated data processing equipment |
| ADPE | automatic data processing equipment |
| ADPF | automated data processing facility |
| ADPL | as-designed parts list |
| ADPS | acceptance data package system |
| ADPSSM | ADP system security monitor |
| ADR | Aerospace and Defense Research |
| ADRL | automatic drawing release list |
| ADS | air data sensor |
| ADS | air data system (subsystem) |
| ADS | angular displacement sensor |
| ADS | ascent design system |
| ADS | attitude determination subsystem |
| ADS | attitude display system |
| ADS | audio distribution system |
| ADSA | alternate demonstration structural article |
| ADSF | automatic directional solidification furnace |
| ADT | air data transfer |
| ADTA | air data transducer assembly |
| ADU | annunciator display unit |
| ADU | ascent driver unit |
| AE | architectural and engineering |
| AEB | aft equipment bay |
| AEC | American Engineering Council |
| AEC | Atomic Energy Commission |
| AEC | aft end cone |
| AEC | aft events controller |
| AECS | area entry control system |
| AECS | automated entry control system |
| AED | Aerospace Electrical Division (Westinghouse) |
| AED | analog event distributor |
| AEDC | Arnold Engineering Development Center |
| AEDS | analog event distribution system |
| AEM | acoustical emission monitoring |
| AEM | arsenal exchange model |
| AEM | assembly and external maintenance |
| AEOP | adaptive electro-optical processor |
| AER | Atomic Energy Research |
| AERO | Aeroballistics (MSFC) |
| AES | American Electrochemical Society |
| AES | American Electroplaters Society |
| AES | Auger electron spectroscopy |
| AES | advanced electrical schematic |
| AES | analog event system |
| AES | atmosphere exchange system |
| AESOP | an easy system of programming |
| AET | aerosurface end-to-end test |
| AET | algorithm evaluation and test |
| AETB | alumina-enhanced thermal barrier |
| AETL | approved engineering test laboratory |
| AF | Air Force |
| AF | aft fuselage |
| AF | airframe |
| AF | audio frequency |
| AF | award fee |
| AF/DBS | areal fluid data base system |
| AF/IN | Air Force/Intelligence |
| AFA | American Foundrymen's Association |
| AFA | airframe assembly |
| AFAD | armed forces acquisition document |
| AFAL | Air Force Astronautics Laboratory |
| AFAL | Air Force Avionics Laboratory |
| AFALD | Air Force Acquisition Logistics Division (WPAFB) |
| AFAPL | Air Force Aero Propulsion Laboratory |
| AFATL | Air Force Armaments Test Laboratory |
| AFB | Air Force base |
| AFBMA | Antifriction Bearing Manufacturing Association |
| AFBMD | Air Force Ballistic Missile Division |
| AFC | aerodynamic flight control |
| AFC | automatic flight control |
| AFC | automatic frequency control |
| AFCS | automatic flight control system |
| AFCSC | Air Force Cryptologic Support Center |
| AFD | acceptance for data |
| AFD | aft flight deck |
| AFD | assistant flight director |
| AFDE | aft flight deck equipment |
| AFDO | aft flight deck operator |
| AFDR | ascent flight design review |
| AFE | Aeroassist Flight Experiment |
| AFEB | Award Fee Evaluation Board |
| AFEC | Award Fee Evaluation Committee |
| AFESD | Air Force Electronic Systems Division |
| AFETR | Air Force Eastern Test Range |
| AFETRM | Air Force Eastern Test Range Manual |
| AFEV | Air Force experiment vehicle |
| AFF | acceptance and ferry flight |
| AFFDL | Air Force Flight Dynamics Laboratory |
| AFFTC | Air Force Flight Test Center (EAFB) |
| AFFTC/RPL | Air Force Flight Test Center/Rocket Propulsion |
| AFGE | American Federation of Government Employees |
| AFGL | Air Force Geophysics Laboratory |
| AFGWC | Air Force Global Weather Center |
| AFI | automatic fault isolation |
| AFLC | Air Force Logistics Command |
| AFM | Air Force manual |
| AFM | arm/firing mechanism |
| AFMDC | Air Force Missile Development Center |
| AFML | Air Force Materials Laboratory |
| AFMTC | Air Force Missile Test Center |
| AFO | abort from orbit |
| AFO | announced flight opportunity |
| AFOSH | Air Force Occupational Safety and Health |
| AFOTEC | Air Force Operational Test and Evaluation Center |
| AFP | Air Force plant |
| AFP | Ariane-furnished property |
| AFP | advanced flexible processor |
| AFP888 | designation for P80-1 spacecraft |
| AFPC | Air Force Program Control |
| AFPD | authorization for program development |
| AFPM | Air Force program manager |
| AFPR | Air Force plant representative |
| AFR | Air Force regulation |
| AFRPL | Air Force Rocket Propulsion Laboratory (EAFB) |
| AFRSI | advanced flexible reusable surface insulation |
| AFS | Air Force standard |
| AFS | Air Force station |
| AFS | ascent flight system |
| AFSA | Air Force study and analysis |
| AFSAT | Air Force satellite |
| AFSATCOM | Air Force satellite communication(s) |
| AFSC | Air Force Space Command |
| AFSC | Air Force Systems Command |
| AFSC | Air Force specialty code |
| AFSCF | Air Force Satellite Control Facility |
| AFSCF | Air Force Space Command Facility |
| AFSCF | Air Force Systems Command Facility |
| AFSCN | Air Force Space Command network |
| AFSCN | Air Force satellite control network |
| AFSCS | Air Force satellite communications system |
| AFSD | Air Force Space Division |
| AFSIE | Air Force standard items and equipment |
| AFSIG | Ascent Flight System Integration Group |
| AFSLV | Air Force space launch vehicle |
| AFSPACECOM | Air Force Space Command |
| AFSRT | avionics flight systems readiness test |
| AFSSD | Air Force Space Systems Division |
| AFSTC | Air Force Satellite Test Center |
| AFSTC | Air Force Space Technology Center |
| AFSTC | Air Force Space Technology Command |
| AFSWC | Air Force Special Weapons Center (Holloman AFB) |
| AFT | active fine tracker |
| AFT | aerodynamic flight test |
| AFT | atmospheric flight test |
| AFTA | acoustic fatigue test article |
| AFTA | aft frame tilt actuator |
| AFTEC | Air Force Test and Evaluation Center |
| AFTOC | Air Force Tactical Operations Center |
| AFTP | Air Force test procedure |
| AFTS | aft fuselage thrust structure |
| AFWAL | Air Force Weapons Analysis Laboratory |
| AFWAL | Air Force Wright Aeronautical Laboratory |
| AFWAL/ML | Air Force Wright Aeronautical Lals Laboratory |
| AFWL | Air Force Weapons Laboratory |
| AFWPAL | Air Force Wright-Patterson Aeropropulsion Laboratory |
| AFWSG | Air Force Weapons System Group |
| AFWTR | Air Force Western Test Range |
| AG | artificial gravity |
| AG | attitude gyro |
| AGAA | attitude gyro accelerometer assembly |
| AGAP | attitude gyro accelerometer package |
| AGARD | Advisory Group for Aeronautical Research and Development |
| AGC | Aerojet General Corporation |
| AGC | automatic gain control |
| AGCA | automatic ground-controlled approach |
| AGCS | automatic ground control station |
| AGCU | air/ground cooling unit |
| AGCU | attitude gyro coupling unit |
| AGE | aerospace ground equipment |
| AGE | air/ground equipment |
| AGE | automatic ground equipment |
| AGI | agreement item |
| AGL | above ground level |
| AGL | above-ground link |
| AGL | absolute ground level |
| AGMA | American Gear Manufacturer's Association |
| AGMC | Aerospace Guidance and Metrology Center |
| AGN&C | advanced guidance, navigation, and control |
| AGO | Santiago, Chile (STDN) |
| AGOES | advanced geosynchronous observation environment |
| AGOSS | automated ground operations scheduling system (KSC) |
| AGREE | Advisory Group in Reliability of Electronic Equipment |
| AGS | ASPS gimbal system |
| AGS | abort guidance system |
| AGS | antigravity suit |
| AGT | adaptive guidance throttling |
| AH | ampere hour |
| AH | attitude hold |
| AHCS | advanced helicopter control system |
| AHI | artificial horizon indicator |
| AHM | automatic hold mode |
| AHP | analytical hierarchy process |
| AHP | pitch axis attitude hold |
| AHR | ablative heat rate |
| AHR | roll axis attitude hold |
| AHRS | attitude heading reference system |
| AHS | aft heat shield |
| AI | action item |
| AI | airspeed indicator |
| AI | altimeter indicator |
| AI | altitude indicator |
| AI | anti-icing |
| AI | artificial intelligence |
| AI | associate investigator |
| AI/ES | artificial intelligence/expert system |
| AIA | Aircraft Industries Association |
| AIAA | American Institute of Aeronautics and Astronautics |
| AICBM | anti-ICBM |
| AICC | action item control card |
| AICE | American Institute of Chemical Engineers |
| AICP | aerodynamic instrumental coefficient package |
| AICS | action item closeout sheet |
| AID | abbreviated item description |
| AID | action item disposition |
| AID | analog input differential |
| AID | audit item disposition |
| AIDE | aerospace installation diagnostic equipment |
| AIDS | airborne integrated data system (subsystem) |
| AIEE | American Institute of Electrical Engineers |
| AIIM | Association for Information and Image Management |
| AIL | Avionics Integration Laboratories |
| AILAS | automatic instrument landing approach system |
| AILS | automatic instrument landing system |
| AIM | automatic information management |
| AIME | American Institute of Mechanical Engineers |
| AIOD | ascent insertion on-orbit deorbit |
| AIP | aircraft instrumented payload |
| AIP | avionics integration plan |
| AIR | action item report |
| AIR | adaptive intercommunication requirement |
| AIS | action item sheet |
| AIS | airborne imaging spectrometer |
| AIS | airlock illumination subassembly |
| AIS | analog-in single-ended |
| AISC | American Institute of Steel Construction |
| AISD | Autonetics ICBM Systems Division (Rockwell) |
| AISI | American Iron and Steel Institute |
| AIST | Agency of Industrial Science and Technology |
| AIST | abbreviated integration system test |
| AIST | advanced interferometric system technology |
| AISTR | advanced interferometric system technology requirement |
| AIT | autoignition test |
| AIU | abort interface unit |
| AIU | avionics interface unit |
| AJ | antijamming |
| AJ | assembly jig |
| AJCS | automated job card system |
| AKA | active keel actuator |
| AKM | apogee kick motor |
| AL | airlock |
| AL | approach and landing |
| AL | autoland |
| ALAS | approach/landing autopilot subsystem |
| ALASAT | air-launched antisatellite |
| ALASS | alternate low-altitude surveillance system |
| ALB | acceptance log book |
| ALC | aft load controller |
| ALC | air logistics center |
| ALC | audio load compensator |
| ALC | automatic level control |
| ALC | automatic light control |
| ALCA | aft load controller assembly |
| ALCA | automatic level-control assembly |
| ALCC | Airborne Launch Control Center |
| ALCM | air-launched cruise missile |
| ALCOA | Aluminum Corporation of America |
| ALCOM | algorithm line-of-sight comparison |
| ALDC | automatic load and drive control |
| ALDO | activity-level-dependent operation |
| ALE | Airborne Laser Experiment |
| ALE | airport lighting equipment |
| ALERT | acute launch emergency reliability tip |
| ALERT | acute launch emergency restraint tip |
| ALFA | air-lubricated free attitude |
| ALFT | approach and landing flight test |
| ALGOL | algorithmic language |
| ALIO | activity-level-independent operation |
| ALL | Airborne Laser Laboratory |
| ALMS | automated logistics management system |
| ALOSA | algorithm line-of-sight angle |
| ALPS | advanced liquid propulsion system |
| ALPS | approach and landing procedures simulator |
| ALRC | Aerojet Liquid Rocket Company |
| ALRUTS | automated line replaceable unit tracking system (KSC) |
| ALS | Ada language system |
| ALS | advanced launch system |
| ALS | advanced logistics system |
| ALS | airlock system |
| ALS | alternative landing site |
| ALS | approach/landing system |
| ALS | automatic landing system |
| ALSA | astronaut life support assembly |
| ALSE | astronaut life support equipment |
| ALSEMP | ALS Engineering Management Plan |
| ALSGEM | ALS global evaluation module |
| ALSS | advanced life support system |
| ALSS | airlock support system (subsystem) |
| ALSSSWG | ALS System Security Working Group |
| ALSSW | ALS software |
| ALSYM | ALS model |
| ALT | approach and landing test |
| ALTR | approach and landing test requirement |
| ALTS | avionics LRU tracking system |
| ALU | arithmetic/logic unit |
| ALV | advanced launch vehicle |
| ALV | advanced logistics vehicle |
| ALVIB | algorithm payload vibration |
| AM | Administration and Management Operations (KSC |
| AM | actuator mechanism |
| AM | aeromedical monitor |
| AM | airlock module |
| AM | alpha meter |
| AM | amplitude modulated |
| AM | amplitude modulation |
| AM | antenna management |
| AM | assurance management |
| AMAL | Aeronautical Medical Acceleration Laboratory |
| AMAL | Aviation Medical Acceleration Laboratory |
| AMBD | automated maintenance data base |
| AMC | Air Material Command |
| AMC | Army Missile Command |
| AMC | aft motor controller |
| AMC | automatic manual control |
| AMC | automatic mixture control |
| AMCA | aft motor controller assembly |
| AMCC | ADL master control console |
| AMCM | advanced missions cost model |
| AMCR | automated master change record |
| AMDCS | assurance management document control system |
| AMDS | advanced missions docking system (subsystem) |
| AME | abort maneuver evaluator |
| AMEC | aft master events controller |
| AMEU | alpha/Mach indicator electronic unit |
| AMF | abort motor facility |
| AMF | apogee memory image |
| AMFL | Aeromedical Field Laboratory |
| AMG | Activation Management Group |
| AMG | angle of the middle gimbal |
| AMI | airspeed/Mach indicator |
| AMI | alpha/Mach indicator |
| AMI | apogee memory image |
| AMIC | Automated Management Information Center |
| AMIS | acquisition management information system |
| AMK | aircraft modification kit |
| AML | approved materials list |
| AMLC | asynchronous multiline controller |
| AMLS | advanced manned launch system |
| AMMM | autonomous magnetic momentum management |
| AMO | Aerospace Medical Operations (JSC) |
| AMOOS | advanced maneuvering orbit-to-orbit Shuttle |
| AMOS | Air Force Maui optical site |
| AMPD | Applied Materials Physics Division |
| AMPR | aeronautical manufacturer's planning report |
| AMPR | aeronautical manufacturer's progress report |
| AMPS | atmosphere, magnetosphere, and plasmas in space |
| AMPS | atmospheric magnetospheric plasma system |
| AMPTE | active magnetospheric particle tracer explorer |
| AMR | Atlantic Missile Range |
| AMR | area-to-mass ratio |
| AMRF | Automated Manufacturing Research Facility |
| AMRO | AMR operations |
| AMRV | astronaut maneuvering vehicle |
| AMS | acoustic measurement system |
| AMS | actuation mechanism subsystem |
| AMS | aeronautical material specification |
| AMS | amplifier subsystem |
| AMS | attached manipulator system |
| AMS | automated material system |
| AMS | automated measurement system |
| AMSC | advanced military space flight capability |
| AMSD | Autonetics Marine Systems Division |
| AMST | advanced medium STOL transport |
| AMT | auxiliary master tape |
| AMTAS | automatic modal tuning and analysis system |
| AMTD | automatic magnetic tape dissemination |
| AMTF | Acoustic Model test Facility |
| AMU | astronaut maneuvering unit |
| AMU | attitude match update |
| AMW | angular momentum wheel |
| AMX | AM transmitter-receiver |
| AMY | Ada management yield |
| AN | Army-Navy |
| AN | alphanumeric |
| ANA | Air Force-Navy aeronautical bulletin |
| ANARS | autonomous navigation and attitude reference system |
| ANC | Air Force-Navy-civil |
| ANC | active nutation control |
| AND | Air Force-Navy aeronautical design standard |
| AND | Air Force-Navy design |
| ANI | authorized, not implemented |
| ANL | automatic noise limiter |
| ANMCC | Alternate National Military Command Center |
| ANRA | air navigation radio aid |
| ANSI | American National Standards Institute |
| ANT | Antigua (ETR) |
| ANT | Antigua Island |
| ANVIL | CAD tool |
| AO | acoustic-optical |
| AO | analog output |
| AO | announcement of opportunity |
| AOA | American Ordnance Association |
| AOA | abort once around |
| AOA | airborne optical adjunct |
| AOA | angle of attack |
| AOC | annual operating cost |
| AOC | auxiliary output chip |
| AOCP | AVCS on-board computer program |
| AOCP | ac on-board computer program |
| AOCRD | acceptance and operational checkout requirements |
| AOCS | attitude and orbit control subsystem |
| AOD | Aircraft Operations Division (JSC) |
| AOD | advanced object data |
| AOD | analog output differential |
| AOD | assistant operations director |
| AOES | advanced orbit ephemeris system |
| AOFEE | advanced orbiter flight evaluation experiment |
| AOI | area of interest |
| AOIS | automatic optical inspection system |
| AOL | area of launch |
| AOM | acoustic-optic modulator |
| AOP | annual operating plan |
| AOP | assembly operations plan |
| AOPL | advance order parts list |
| AOPM | airline operations planning model |
| AOQ | average outgoing quality |
| AOQL | average outgoing quality limit |
| AOS | ACTS optical system |
| AOS | acquisition of signal |
| AOS | airborne optical system |
| AOSP | advanced on-board signal processor |
| AOT | actual operating time |
| AOT | alignment optical telescope |
| AOT | avionics operating time |
| AOT | avionics overall test |
| AP | Procurement, Supply, and Transportation (KSC |
| AP | accelerometer package |
| AP | access panel |
| AP | access point |
| AP | administrative procedure |
| AP | air pressure |
| AP | atmospheric and space physics |
| AP | autopilot |
| AP&P | advanced plans and programs |
| APA | abort programmer assembly |
| APA | allowance for program adjustment |
| APAE | attached payload accommodations equipment |
| APAS | Aerodynamic Performance and Sizing Program |
| APC | adaptive payload carrier |
| APC | advanced propulsion comparison |
| APC | aft power controller |
| APC | airborne particle counter |
| APC | armored personnel carrier |
| APC | automatic phase control |
| APCA | aft power controller assembly |
| APCP | Aerojet photoelectric cell program |
| APD | area passive dosimeter |
| APD | avalanche photo diode |
| APDL | Ada programming design language |
| APE | arithmetic processing extension |
| APES | advanced processor emulator system |
| APGC | Air Proving Ground Command |
| API | air position indicator |
| APIF | automated process information file |
| APIRD | authorized procurement information requirements |
| APIRL | authorized procurement information requirements list |
| APK | accelerometer package |
| APL | applications program library |
| APLAC | analysis program linear active circuit |
| APLIS | automated payload ICD system |
| APLM | applications program library maintenance |
| APM | ascent particle monitor |
| APM | assistant project manager |
| APM | associate program manager |
| APMSM | assembly phase maintenance simulation model |
| APN | ACE problem notice |
| APO | automated purchase order |
| APP | advance procurement package |
| APP | astrophysics payload |
| APPF | Automated Payload Processing Facility |
| APPLE | advanced propulsion payload effect |
| APPS | auxiliary payload power system |
| APR | advance parts release |
| APRF | Army Pulse Radiation Facility |
| APS | aft propulsion system (subsystem) |
| APS | ascent propulsion system |
| APS | attitude propulsion system (subsystem) |
| APS | automated planning system |
| APS | automatic processing system |
| APS | auxiliary power subsystem |
| APS | auxiliary propulsion system |
| APSAP | auxiliary propulsion system aft pod |
| APSE | Ada programming support environment |
| APSS | atmospheric pressure supply subsystem |
| APT | airborne pointer tracker |
| APT | astronaut preference test |
| APT | automatic programmed tool |
| APTE | automated production test equipment |
| APTI | actions per time interval |
| APU | auxiliary power unit |
| APU | auxiliary propulsion unit |
| APUS | auxiliary power unit subsystem |
| APUT | auxiliary power unit test |
| APWL | automatically processed wire list |
| AQL | acceptance quality level |
| AR | acceptance readiness |
| AR | acceptance review |
| AR | acid resisting |
| AR | antireflection |
| AR | antireflective |
| AR | as required |
| AR | atmospheric revitalization |
| ARA | attitude reference assembly |
| ARA | auxiliary recovery antenna |
| ARABSAT | Saudi Arabian communications satellite |
| ARAP | Aeronautical Research Associates of Princeton |
| ARAP | astronaut rescue air pack |
| ARAR | accident risk assessment report |
| ARC | Ames Research Center (NASA, Moffet Field, California) |
| ARC | aggregation of red blood cells |
| ARC | automatic responsivity correction |
| ARCOMSAT | Arab League communications satellite |
| ARCS | aft reaction control subsystem |
| ARD | abort region determinator |
| ARDC | Air Research and Development Command (Air Force) |
| ARES | advanced railroad electronic system |
| ARFDS | automatic reentry flight dynamics simulator |
| ARGMA | Army Rocket and Guided Missile Agency |
| ARIA | advanced range instrumentation aircraft |
| ARIES | astronomical radio interferometric Earth surveying |
| ARINC | Aircraft Radio, Incorporated |
| ARIS | ALS requirements information system |
| ARIS | advanced range instrumentation ship |
| ARMA | accumulator-reservoir manifold assembly |
| ARMS | automated requirements management system |
| ARN | action and reply notice |
| ARN | additional reference number |
| ARP | as-run procedure |
| ARPA | Advanced Research Projects Agency (DOD) |
| ARPCS | atmosphere revitalization pressure control system |
| ARPCS | atmospheric revitalization pressure control system |
| ARPESH | accurate and reliable prototype Earth sensor head |
| ARQ | automatic request |
| ARRS | air recovery and rescue service |
| ARS | ALS release system |
| ARS | Air Rescue Service |
| ARS | American Rocket Society |
| ARS | air revitalization system (subsystem) |
| ARS | atmosphere revitalization subsystem |
| ARS | atmospheric revitalization section |
| ARS | atmospheric revitalization system |
| ARS | attitude reference system |
| ARSDA | advanced radiation space defense application |
| ART | automated reasoning tool |
| ARTCC | air route traffic control center |
| ARTO | Advanced Radiation Technology Office |
| ARTOOS | Advanced Radiation Technology Office optical support |
| ARTS | advanced remote tracking station |
| ARTS | automated restricted tracking system |
| ARTS | automated retrieval and tracking system |
| ARTSE | Ada run-time support environment (for embedded systems) |
| ARU | attitude reference unit |
| AS | antispoof |
| AS&ASD | Autonetics Sensors and Aircraft Systems Division |
| AS/CP | attitude set/control panel |
| AS/RS | automated storage and retrieval system |
| ASA | American Standards Association |
| ASA | abort sensor assembly |
| ASA | adapter service area |
| ASA | advanced system avionics |
| ASA | aerosurface amplifier |
| ASA | aerosurface servoamplifier |
| ASAC | aerodynamic surfaces assembly and checkout |
| ASAP | ACE Shuttle application processing |
| ASAP | Aerospace Safety Advisory Panel |
| ASAP | advanced sensor analysis program |
| ASAP | as soon as possible |
| ASAPTS | automated scheduling and product tracking system |
| ASAS | aerodynamic stability augmentation system |
| ASAT | antisatellite |
| ASATS | antisatellite simulation |
| ASB | airlock stowage bag |
| ASC | American Satellite Corporation |
| ASC | Ascension Island |
| ASC | aerodynamic surface control |
| ASC | aerosurface control |
| ASC | airlock support component |
| ASC | array stowage container |
| ASC | automatic sensitivity control |
| ASC | auxiliary switch normally closed |
| ASCADS | aft station command and data system |
| ASCE | American Society of Civil Engineers |
| ASCE | airlock signal conditioning electronics |
| ASCII | American Standard Code for Information Interchange |
| ASCOP | Applied Science Corporation of Princeton (Division of EMR) |
| ASCP | attitude set control panel |
| ASCS | atmosphere storage and control subsystem (Spacelab) |
| ASCS | atmospheric storage and control section |
| ASCS | attitude stabilization and control system |
| ASD | Aeronautical Systems Division (Air Force) |
| ASD | advanced systems development |
| ASDE | aerosurface driver electronics |
| ASDM | aerosurface driver/monitor |
| ASDTIC | analog-signal-to-discrete-time-interval converter |
| ASE | advanced space engine |
| ASE | aerospace support equipment |
| ASE | airborne support equipment |
| ASE | automatic support equipment |
| ASEA | American Society of Engineers and Architects |
| ASED | Avionics System Engineering Division (JSC) |
| ASF | Atmospheric Science Facility |
| ASFT | abbreviated system functional test |
| ASFTS | auxiliary system function test stand |
| ASG | Aeronautical Standards Group |
| ASG | Avionic Subsystems Group |
| ASGPD | attitude set and gimbal position display |
| ASI | airspeed indicator |
| ASI | amended shipping instructions |
| ASI | augmented spark igniter |
| ASI | augmented spark indicator |
| ASI | augmented system ignition |
| ASIC | application-specific integrated circuit |
| ASIC | application-specific integration circuit |
| ASK | amplitude shift keying |
| ASKA | automatic system for kinematic analysis |
| ASL | above sea level |
| ASL | approved source list |
| ASLU | antenna select logic unit |
| ASM | American Society for Metals |
| ASM | air-to-surface missile |
| ASME | American Society of Mechanical Engineers |
| ASN | average sample number |
| ASO | Aviation Safety Office |
| ASO | auxiliary switch normally open |
| ASP | aerosurface position |
| ASP | airborne science program |
| ASPI | aerosurface position indicator |
| ASPP | atmospheric and space plasma physics |
| ASPR | armed service procurement regulation |
| ASPS | annular suspension and pointing system |
| ASPSL | ASPP Sortie Laboratory |
| ASQC | American Society for Quality Control |
| ASR | air-sea rescue |
| ASR | automatic send and receive |
| ASR | avionic system review |
| ASRE | American Society of Refrigerating Engineers |
| ASRM | abort solid rocket motor |
| ASRM | advanced solid rocket motor |
| ASRS | automated Shuttle requirement system |
| ASRS | automated support requirements system |
| ASSD | Autonetics Strategic Systems Division |
| ASSE | American Society of Sanitary Engineers |
| ASSESS | airborne science Shuttle experiments system simulation |
| ASSH | advanced space systems hardening |
| ASSO | assistant system security officer |
| ASST | American Society for Steel Treating |
| AST | Atlantic standard time |
| AST | all-systems test |
| ASTB | AGN&C simulation test bed |
| ASTD | Advanced Space Technology Division |
| ASTE | American Society of Tool Engineers |
| ASTF | Aeropropulsion System Test Facility |
| ASTG | Aerospace Test Group |
| ASTIA | Armed Services Technical Information Agency |
| ASTM | American Society for Testing Materials |
| ASTP | Apollo-Soyuz Test Project |
| ASTRA | advanced star tracker |
| ASTRO | ascent trajectory optimization |
| ASTS | avionic system test specification |
| ASVIB | algorithm scoreboard vibrations |
| AT | access tower |
| AT | action time |
| AT | assembly truss |
| AT&L | acceptance test and logistics |
| AT&T | American Telephone & Telegraph |
| ATA | Air Transport Association |
| ATA | abort time assembly |
| ATA | advanced tactical aircraft |
| ATA | aft test article |
| ATA | assembly test article |
| ATA | avionics test article |
| ATAC | Advanced Technology Advisory Committee |
| ATC | ATE computer |
| ATC | Air Training Command |
| ATC | ablative thrust control |
| ATC | active thermal control |
| ATC | air traffic control |
| ATC | aircraft target computer |
| ATC | assistant test conductor |
| ATC/FTD | Air Training Command/Field Training Detachment |
| ATCA | attitude translation control assembly |
| ATCO | ambient temperature catalytic oxidizer |
| ATCS | active thermal control system (subsystem) |
| ATDAP | aircraft target data acquisition program |
| ATDB | aerothermal data book |
| ATDB | aerothermodynamic data book |
| ATDF | automated test development folder |
| ATDP | acceptance test data package |
| ATDP | aircraft target data program |
| ATDRP | aircraft target data reduction program |
| ATE | aerospace training equipment |
| ATE | airborne test equipment |
| ATE | automated test equipment |
| ATE | automatic test engineer |
| ATE | automatic test equipment |
| ATF | advanced tactical fighter |
| ATG | Aerospace Test Group |
| ATG | automated time line generator |
| ATH | above the horizon |
| ATI | average total inspection |
| ATIS | automatic terminal information system |
| ATL | Advanced Technology Laboratories |
| ATL | Aero-Thermal Lab (Marquardt) |
| ATL | Avionics Test Laboratory |
| ATLAS | abbreviated test language for avionic systems |
| ATLAS | analysis of thrust structure loads and stresses |
| ATM | Apollo telescope mount |
| ATM | ascent trajectory model |
| ATO | abort to orbit |
| ATO | automatic turn-on |
| ATOLL | acceptance test of launch language |
| ATOP | Ada technology operational planning |
| ATOS | automated technical order system |
| ATP | acceptance test procedure |
| ATP | acceptance test program |
| ATP | acquisition, tracking, and pointing |
| ATP | activation test program |
| ATP | advanced technical payroll |
| ATP | airborne tracking and pointing |
| ATP | authority to proceed |
| ATP-FC | acquisition, tracking, and pointing fire control |
| ATPA | alpha temperature probe assembly |
| ATPG | automatic test program generator |
| ATPSE | acquisition, tracking, and pointing system emulator |
| ATR | air transport rack |
| ATR | air transport radio |
| ATR | air transport rating |
| ATR | air transportation rack |
| ATRS | automated training records system |
| ATS | Atlantic tracking ship |
| ATS | Atlantic tracking station |
| ATS | acceptance test specification |
| ATS | administrative telephone system |
| ATS | administrative terminal system |
| ATS | advanced technology satellite |
| ATS | analog tone signal |
| ATS | applications technology satellite |
| ATS | assembly trusses and structure |
| ATS | asynchronous task storage |
| ATS | automatic terminal system |
| ATS | automatic test set |
| ATS | automatic transcribing system |
| ATT | acceptance thermal testing |
| ATTACK | advanced threat technology attack coordination and |
| ATTS | automatic telemetry tracking system |
| ATU | audio terminal unit |
| ATU | audio/thermal unit |
| ATVC | ascent thrust vector control (controller) |
| ATVC | automatic thrust vector control |
| ATVCD | ascent thrust vector control driver |
| ATVCS | automatic thrust vector control system |
| AU | accounting unit |
| AU | astronomical unit |
| AUASAM | automatic aimpoint selection and maintenance |
| AUB | aft utility bridge |
| AUC | average unit cost |
| AUCV | advanced unmanned cargo vehicle |
| AUDF | automated unit development folder |
| AUF | authorized user file |
| AUP | Ames unitary plan (wind tunnel) |
| AUTO-BF | automatic body flap |
| AUTO-P | automatic pitch control mode |
| AUTO-YR | automatic yaw roll mode |
| AUTODIN | automatic digital network |
| AUTOVON | automatic voice network |
| AV | audiovisual |
| AV | average value |
| AVC | automatic volume control |
| AVCG | automatic vapor crystal growth |
| AVCOR | algorithm vibration correlation |
| AVCS | attitude and velocity control system (subsystem) |
| AVD | air vehicle detection |
| AVE | Avenal (TACAN station) |
| AVE | aerospace vehicle equipment |
| AVE | airborne vehicle equipment |
| AVE | atmospheric variability experiment |
| AVE | automatic volume expansion |
| AVID | automated verification information data base |
| AVL | Avionics Verification Laboratory |
| AVL | address validity |
| AVLSI | advanced, very large scale integration |
| AVO | avoid verbal orders |
| AVRCS | attitude, velocity, reaction control system |
| AVREL | availability and reliability program |
| AVSM | auxiliary video switch matrix |
| AVT | acceptance vibration testing |
| AVVEU | altitude/vertical velocity indicator electronic unit |
| AVVI | altitude/vertical velocity indicator |
| AW | airlock wall |
| AW | assembly workstand |
| AWAA | attack warning and attack assessment |
| AWACS | advanced warning and control system |
| AWCS | agency-wide coding structure |
| AWG | Activation Working Group |
| AWG | American wire gauge |
| AWI | accommodation weight investigation |
| AWL | augmented wire list |
| AWL | automated wire list |
| AWPV | automated weld process verification |
| AWS | American Welding Society |
| AWS | advance warning system |
| AWS | air weather service |
| AWS | automated wiring system |
| AXAF | Advanced X-ray Astrophysics Facility |
| AZEL | azimuth and elevation |
| Ada | DOD high-level programming language |
| Adc | amperes direct current |
| Al-Li | aluminum lithium |
| ac | alternating current |
| autoland | automatic landing |