| HACS | Hawaii Association Of Charter Schools | 夏威夷特许学校协会 |
| HACS | Hazard Assessment Computer System | 危险评估计算机系统 |
| HACS | Humanities and Cultural Studies | 人文与文化研究 |
| HACS | Have A Cool Summer (band) | 度过一个凉爽的夏天（乐队） |
| HACS | Hawaii Aviation Contract Services | 夏威夷航空合同服务 |
| HACS | Helicopter Armored Crashworthy Seat | 直升机装甲防撞座椅 |
| HACS | hyperactive child syndrome | 多动儿童综合征 |
| HACS | Hendersonville Area Computer Society | 亨德森维尔地区计算机学会 |
| HACS | Health And Community Studies | 健康与社区研究 |