NASA Abbreviations and Acronyms
- ACPOAssociate Contractor Project Office
- ADUAscent Driver Unit
- ADUAnnunciator Display Unit
- AIVAssembly, Integration, And Verification
- ALSadvanced logistics system
- ALSAutomatic Landing System
- ALSAdvanced Launch System
- ALSAlternative Landing Site
- ALSAda Language System
- ALSairlock system
- AMUAstronaut Maneuvering Unit
- AMUAttitude Match Update
- AMXAM Transmitter-Receiver
- APNACE Problem Notice
- ARUAttitude Reference Unit
- ASPAerosurface Position
- ASPAirborne Science Program
- ASPAcquisition Strategy Planning
- ASPAttached Shuttle Payload
- ASPAttitude Sensor Package
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