| Acronym | Meaning |
| HATS | Hardened Alternative Trailer System (various organizations) |
| HATS | Hardened Tactical Shelter |
| HATS | Hardware Acceptance Test Specifications |
| HATS | Harrisburg Area Transportation Study (Pennsylvania; est. 1965) |
| HATS | Health Alert Threat Summary |
| HATS | Helena Area Transit Service (Helena, MT) |
| HATS | Howard Area Transit Service |