ACAS
Application Control Architecture Services
CAS
(1) Chemical Abstracts Service, (2) WMO Commission for Atmospheric Sciences
CAS
Computer Aided Service (System)
CAS
Collision Avoidance System
A-GPS
Assisted Global Positioning System
AACS
Advanced Access Content System
AAS
Advanced Automation System
ABATS
Automated Bit Access Test System
ABBS
Apple Bulletin Board System