| ACS | American Chemical Society | - | Computer Acronyms(common) |
| ACS | Acute Coronary Syndrome | - | Computer Acronyms(common) |
| ACS | Adiabatically Corrected Sudden | - | Computer Acronyms(common) |
| ACS | American Chemical Society | - | Medical |
| ACS | Affiliated Computer Services (NYSE ACS) - American Cancer Society - American Chemical Society - Association Of Caribbean States | - | Astronomy |
| ACS | American Chemical Society | - | Business and Finance |
| ACS | Administrative Computing And Systems | - | Business and Finance |
| ACS | Automated Cartridge System | - | Business and Finance |
| ACS | Account Control System | - | Business and Finance |
| ACS | Aldus Color File | - | Business and Finance |
| ACS | Auxiliary Cooling System | - | Business and Finance |
| ACS | Audio Conferencing Services
| - | Human Genome |
