American Astronomical Society 
Associate of Applied Science 
Advanced Automation System 
Alive And Smiling 
Atomic Absorption Spectroscopy 
All-to-All Scatter 
American Astronautical Society 
Ascii Adjust for Subtraction 
ASIA SMITH 
Associate in Applied Science 
Atomic Absorption Spectrometry 
Atomic Absorption Spectrophotometer 
Australian Accounting Standard 
Automated Accounting System 
Abort Advisory System 
Adaptive Antenna System 
Advanced Automated System 
Aeronautical Advisory Station 
African Academy of Sciences 
Agencywide Administrative Systems 
Airport Advisory Service 
Alternate Access to Station 
Alternative Air Source 
American Antiquarian Society 
American Association of Suicidology 
Ancient Astronaut Society 
Arithmetic Assignment Statement 
Arnold Air Society 
Association for Academic Surgery 
atomic absorption spectrometer