| ACAS | Aboriginal Children's Advancement Society 
| Others |
| ACAS | Academic Credentials Assessment Service
| Others |
| ACAS | Adaptive Cluster Analysis System
| Others |
| ACAS | Adaptive Context Aware Services
| Others |
| ACAS | Adherent Cell Analysis and Sorting
| Others |
| ACAS | Advisory Conciliation and Arbitration Service
| Others |
| ACAS | Advisory Conciliation Arbitration Service
| Others |
| ACAS | Advisory Counselling and Arbitration Service
| Others |
| ACAS | Advisory, Conciliation and Arbitration Service
| Others |
| ACAS | Advisory, Conciliation, and Arbitration Service
| Others |
| ACAS | Affiliate Conformity Assessment Status
| Others |
| ACAS | Aged Care Assessment Services
| Others |
| ACAS | Airborne Collision Avoidance System
| Others |
| ACAS | American Chinese Art Society
| Others |
| ACAS | American College of Applied Science
| Others |
| ACAS | Applewood Computers Accounting System
| Others |
| ACAS | Application Control Architecture Services
| Others |
| ACAS | Arizonans Concerned About Smoking
| Others |
| ACAS | Army Commissary Automated System
| Others |
| ACAS | Army Crisis Action System
| Others |
| ACAS | Asian Community AIDS Service
| Others |
| ACAS | Asian Community Aids Services
| Others |
| ACAS | Associacao de Carro Antigo de Sorocaba
| Others |
| ACAS | Associate of Casualty Actuatial Society
| Others |
| ACAS | Associate of the Casualty Actuarial Society
| Others |
| ACAS | Association of Comic Artists Singapore
| Others |
| ACAS | Association of Concerned Africa Scholars
| Others |
| ACAS | Assured Compliance Assessment Solution
| Others |
| ACAS | Asymptomatic Carotid Atherosclerosis Study
| Others |
| ACAS | Automated Collection Analysis Service
| Others |
| ACAS | Automotive Collision Avoidance System
| Others |
| ACAS | Automotive Collision Avoidance Systems
| Others |