| HCO | Human Capital Office (various companies and government agencies) | 人力资本办公室（各公司和政府机构） |
| HCO | Health Care Organization | 卫生保健组织 |
| HCO | Hearing Carry-Over | 听证结转 |
| HCO | Harvard College Observatory | 哈佛大学天文台 |
| HCO | Hearing Carry Over | 听证结转 |
| HCO | Hubbard Communications Office (Scientology) | 哈伯德通信办公室（山达基） |
| HCO | Hubbard Communications Office | 哈伯德通信办公室 |
| HCO | Human Capital Officer | 人力资本官 |
| HCO | Hollister Company | Hollister公司 |
| HCO | Health Care Officer | 卫生保健官员 |
| HCO | Huntco, Inc. | 亨特科公司。 |
| HCO | Head of Contracting Office | 合同办公室负责人 |
| HCO | HC Orsteds Institute (Copenhagen, Denmark) | HC Orsteds研究所（丹麦哥本哈根） |
| HCO | Helicopter Control Officer | 直升机控制官 |
| HCO | Hollister Company (clothing line) | Hollister公司（服装生产线） |
| HCO | Heights Chamber Orchestra (Cleveland Heights, OH) | 高地室内乐团（俄亥俄州克利夫兰高地） |