| Acronym | Definition |
|---|
| HACS➣Hot Aisle Containment System (data center cooling methodology) |
| HACS➣Hawaii Aviation Contract Services |
| HACS➣Health and Community Services (industry reference group; Australia) |
| HACS➣Hazard Assessment Computer System |
| HACS➣Historical and Critical Studies (various universities) |
| HACS➣Have a Crazy Summer |
| HACS➣Humanities and Cultural Studies |
| HACS➣Have A Cool Summer (band) |
| HACS➣Helicopter Armored Crashworthy Seat |
| HACS➣High Assurance Computing System |