- AS stands for (USN Rating) Aviation Support Equipment Technician
- AS stands for Aanstaande
- AS stands for Abandon Ship
- AS stands for Ablaufsprache (German: Sequential Function Chart)
- AS stands for Abstract Syntax
- AS stands for Academia Sinica (Taiwan)
- AS stands for Academy of Science
- AS stands for Access Stratum (3GPP)
- AS stands for Access System
- AS stands for Accounting Standard
- AS stands for Acquisition Strategy
- AS stands for Acquisition/Application System
- AS stands for Acrylonitrile Styrene
- AS stands for Actionscript (scripting language used in flash, similar to Java)
- AS stands for Activesync (Microsoft software)
- AS stands for Activity Start (ITU-T)
- AS stands for Acute Sinusitis
- AS stands for Adam Sandler (actor)
- AS stands for Add/Subtract
- AS stands for Additional Shift (used on overtime forms)