| ACAS | Advisory, Conciliation and Arbitration Service | 英国咨询调解仲裁处 |
| ACAS | Association for Critical Animal Studies | 关键动物研究协会 |
| ACAS | Association of Concerned Africa Scholars | 关注非洲学者协会 |
| ACAS | Asian Community AIDS Services | 亚洲社区艾滋病服务 |
| ACAS | Air Collision Avoidance System | 空中防撞系统 |
| ACAS | Automatic Collision Avoidance System | 自动防撞系统 |
| ACAS | Aged Care Assessment Service (Australia) | 老年护理评估服务（澳大利亚） |
| ACAS | Airborne Collision Avoidance System | 机载防撞系统 |
| ACAS | Associate of the Casualty Actuarial Society | 保险精算学会会员 |
| ACAS | Aboriginal Children's Advancement Society | 社会的进步的土著孩子 |
| ACAS | Adherent Cell Analysis and Sorting | 粘附细胞分析和分选 |
| ACAS | American Capital Strategies, Ltd | 美国资本战略有限公司 |
| ACAS | Asymptomatic Carotid Atherosclerosis Study | 无症状颈动脉粥样硬化研究 |
| ACAS | Army Commissary Automated System | 陆军政委自动化系统 |
| ACAS | Appleton Central Alternative School | 阿普尔顿中央另类学校 |
| ACAS | Aircraft Collision Avoidance System | 飞机防碰撞系统 |
| ACAS | Advanced Close Air Support | 高级近距离空中支援 |
| ACAS | Automated Cable Analyzer System | 自动电缆分析仪系统 |
| ACAS | Australian Crop Accreditation System | 澳大利亚作物认证系统 |
| ACAS | Automated Commissary Accounting System | 自动化小费会计系统 |
| ACAS | Afro-Cuban All Stars | 非洲裔古巴全明星 |
| ACAS | Application Control Architecture Services (DEC) | 应用控制体系结构服务（DEC） |
| ACAS | Advisory, Conciliation, and Arbitration Service | 咨询、调解和仲裁服务 |
| ACAS | analytical chemistry and applied spectroscopy | 分析化学与应用光谱学 |
| ACAS | American Capital Strategies, LTD. | 美国资本策略有限公司。 |
| ACAS | Assistant Chief of Air Staff | 助理空军参谋长 |
| ACAS | Automated Collection Analysis Service | 自动收集分析服务 |
| ACAS | Automated Circuit Assurance, Short | 自动电路保证，短路 |
| ACAS | Automotive Collision Avoidance System | 汽车防撞系统 |
| ACAS | Academic Credentials Assessment Service | 学历评估服务 |
| ACAS | AUTOVON Central Alarm System | AUTOVON中央报警系统 |
| ACAS | Advisory, Conciliation and Arbitration Service (UK) | 咨询、调解和仲裁服务（英国） |
| ACAS | Army Crisis Action System | 陆军危机行动系统 |
| ACAS | Alarm Control and Annunciator Station | 报警控制和信号器站 |
| ACAS | Adaptive Context Aware Services | 自适应上下文感知服务 |
| ACAS | Arizonans Concerned About Smoking | 亚利桑那州人担心吸烟 |
| ACAS | Advisory Conciliation Arbitration Service | 咨询调解仲裁服务 |
| ACAS | Aged Care Assessment Services | 老年护理评估服务 |