| Acronym | Definition |
|---|
| ACOS➣Arc Cosine (Inverse Cosine) |
| ACOS➣American College of Surgeons |
| ACOS➣Asthma-COPD (Chronic Obstructive Pulmonary Disease) Overlap Syndrome |
| ACOS➣Assistant Chief of Staff (also seen as A/COS) |
| ACOS➣Advanced Core Operating System |
| ACOS➣Associate Chief of Staff |
| ACOS➣Arc Cosine |
| ACOS➣American College of Osteopathic Surgeons |
| ACOS➣Advisory Committee on Safety (IEC) |
| ACOS➣A Change of Seasons (Dream Theater album) |
| ACOS➣A Crown of Swords (Wheel of Time; book 7) |
| ACOS➣Air and Space Communications Operations Squadron (US Air Force) |
| ACOS➣Australian Chamber Of Shipping |
| ACOS➣Associazione Cattolica Operatori Sanitari (Italian: Catholic Association of Medics and Paramedics) |
| ACOS➣Anti-Capitalist Operating System |
| ACOS➣Automatic Change-Over Switch |
| ACOS➣Aircraft Certification Office Subsystem |
| ACOS➣Adaptive Cognitive Orthosis Shell |
| ACOS➣Automated Commissary Operations System |
| ACOS➣ACCS Common Operating System |
| ACOS➣Army Common Operating System |
| ACOS➣At Change of Shift |