HACS
| 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 |