| Acronym | Meaning |
![](file.png) | A/L | Air Lock |
![](file.png) | AAFE | Aeroassist Flight Experiment |
![](file.png) | ABCL | As Built Configuration List |
![](file.png) | ABHRS | As Built Hardware Reporting System |
![](file.png) | AC | Alternating Current |
![](file.png) | AC | Comptroller Office |
![](file.png) | ACES | Acoustic Containerless Experiment System |
![](file.png) | ACIP | Assembly Configuration And Integration Panel |
![](file.png) | ACR | Active Cavity Radiometer |
![](file.png) | ACRBC | Acceptance |
![](file.png) | ACRC | Assured Crew Return Capability - Now ACRV |
![](file.png) | ACRIM | Active Cavity Radiometer Irradiance Monitor |
![](file.png) | ACRV | Assured Crew Return Vehicle |
![](file.png) | ACTS | (TOS) Advanced Communications Technology Satellite |
![](file.png) | AD | Aperture Door |
![](file.png) | ADC | Affiliated Data Center |
![](file.png) | ADEOS | Advanced Earth Observing Mission |
![](file.png) | ADP | Acceptance Data Package |
![](file.png) | ADP | Automated Data Processing |
![](file.png) | ADPS | Acceptance Data Package System |
![](file.png) | ADSF | Advanced Directional Solidification Furnace |
![](file.png) | AEG | AEG Telefunken |
![](file.png) | AEPI | Atmospheric Emissions Photo Imaging |
![](file.png) | AES | Atmospheric Exchange System |
![](file.png) | AESE | Airborne Electrical Support Equipment |
![](file.png) | AFB | Air Force Base |
![](file.png) | AFD | Aft Flight Deck |
![](file.png) | AFE | American Flight Echocardiograph |
![](file.png) | AFP | Air Force Program |
![](file.png) | AFR | Air Force Regulation |
![](file.png) | AFSCF | Air Force Satellite Control Facility |
![](file.png) | AFTA | Aft Frame Tilt Actuator |
![](file.png) | AFTE | Autogenic Feedback Training Experiment |
![](file.png) | AGOSS | Automated Ground Operations Scheduling System |
![](file.png) | AHU | Air Handling Unit |
![](file.png) | AI | Artificial Intelligence |
![](file.png) | AIRS | Atmospheric Infrared Sounder |
![](file.png) | AIT | Aeritalia |
![](file.png) | ALAE | Atmospheric Lyman Alpha Experiment |
![](file.png) | ALC | Augmented Landing Site |
![](file.png) | ALERT | Acute Launch Emergency Reliability Tip |
![](file.png) | ALRUTS | Automated Line Replaceable Unit Tracking System |
![](file.png) | ALS | Advanced Launch System |
![](file.png) | ALT | Altimeter |
![](file.png) | AMF | Astronaut Memorial Foundation |
![](file.png) | AMSU | Advanced Microwave Sounding Unit |
![](file.png) | ANSI | American National Standard Institute |
![](file.png) | AO | Assembly Order |
![](file.png) | AOA | Abort Once Around |
![](file.png) | APC | Adaptive Payload Carrier |