- AACS stands for American Association of Christian Schools
- AACS stands for Advanced Access Content System (standard for content distribution and digital rights management)
- AACS stands for American Academy of Cosmetic Surgery
- AACS stands for Alta Autoridade para a Comunicação Social (Portugal)
- AACS stands for American Association of Cosmetology Schools
- AACS stands for Alfred Almond Central School (Almond, NY)
- AACS stands for Attitude and Articulation Control Subsystem
- AACS stands for Adult Advancement and Careers Service (UK)
- AACS stands for Airborne Air Control Squadron
- AACS stands for Army Airways Communications System
- AACS stands for Ann Arbor Christian School (Ann Arbor, MI)
- AACS stands for American Academy of Clinical Sexologists
- AACS stands for Automated Access Control System
- AACS stands for Afsaneh Art and Culture Society (California)
- AACS stands for Australian Army Canteen Service
- AACS stands for Applied Aged Care Solutions (Victoria, Australia)
- AACS stands for Attitude & Articulation Control Subsystem
- AACS stands for Airborne Activity Confinement System
- AACS stands for Airways & Air Communications Service
- AACS stands for Airborne Astrographic Camera System
- AACS stands for Asynchronous Address Communication Systems
- AACS stands for Automated Airspace Computer System
- AACS stands for Automated Analog Circuit Synthesis
- AACS stands for Attitude and Antenna Control Subsystem
- AACS stands for Association for Arkansas Cave Studies, Inc.
- AACS stands for Acquisition Advice Code System
- AACS stands for Armenian American Cultural Society
- AACS stands for Ambient Air Control System
- AACS stands for Associate of Australian Computer Society
- AACS stands for Auxiliary Attitude Control System
- AACS stands for Authentication and Access Control System
- AACS stands for Anti Aircraft Control Station
- AACS stands for American Association of Cemetery Superintendents
- AACS stands for Aircraft Approach Control System (receiver-decoder)
AACS