A&L: Approach and Landing
AA: Airplane Avionics
AA: air-to-air
AAA: Aviation Academy Austria
AABNCP: Advanced Airborne National Command Post
AAFE: Advanced Applications Flight Equipment
AAH: Advanced Attack Helicopter
AAL: above aerodrome level
AB: Avionics Bay
ABCP: Airborne Command Post
ABD: Airborne Ballistics Division
ABETS: Airborne Beacon Test Set
ABI: Avionics Bus Interface
ABL: Airborne Laser
ABL: Aircraft-Based Laser
ABLE: Airborne Laser Evaluation
ABMCP: Airborne Military Command Post
ABNCP: Airborne National Command Post
AC: aerodynamic center
ACA: Altitude Controller Assembly
ACAP: Advanced Computer Airframe Program
ACARE: Advisory Council for Aeronautics Research in Europe
ACE: Attitude Control Electronics
ACEL: Air Crew Equipment Laboratory
ACEU: AeroControl Electronics Unit
ACIP: Aerodynamic Coefficient Identification Package
ACIP: Aerodynamic Coefficient Instrumentation Package
ACME: Attitude Control and Maneuvering Electronics
ACP: Airborne Command Post
ACS: Aft Crew Station
ACS: Altitude Control and Stabilization
ACU: Avionics Cooling Unit
ACUO: Avionics Cooling Unit Operator
AdAeS: Advances in Aeronautical Sciences
ADAP: Aerodynamic Data Analysis Program
ADB: Aerodynamic Data Book
ADC: Aerospace Defense Command
ADFRF: Ames/Dryden Flight Research Facility
ADR: Aerospace and Defense Research
AE&AT: Aircraft Engineering & Aerospace Technology