ACAS
ACAS is most often associated with safety systems that prevent collisions in aircraft or cars, while in the UK it also refers to a public advisory service for workplace dispute resolution and, in tech circles, to adaptive context‑aware services.
Medical
Adherent Cell Analysis and Sorting
Adaptive Cluster Analysis System
Asymptomatic Carotid Atherosclerosis Study
Miscellaneous
Community
Asian Community Aids Services
Arizonans Concerned About Smoking
Association of Concerned Africa Scholars
Governmental
Army Commissary Automated System
Army Crisis Action System
Airborne Collision Avoidance System
Automotive Collision Avoidance System