| Abbreviation | Definition |
|---|---|
| HCA | Hydroxy Citric Acid |
| HCA | Hardware Configuration Audit |
| HCA | Heart Cell Aggregate |
| HCAP | High Capacity Carriers |
| HCC | HepatoCellular Carcinoma |
| HCC | Health Cluster Coordinator |
| HCCD | Mono-deuterated Acetylene |
| HCD | Housing Commission Director |
| HCE | Hyper-Cerebral Electrosis |
| HCE | Health Care Executive |
| HCE | Highly Compensated Employee |
| HCED | Hand Controller Engage Driver |
| HCF | Highest Common Factor |
| HCF | Highest Common Factor |
| HCF | Halt And Catch Fire |
| HCF | HIM Configuration File |
| HCF | High Cycle Fatigue |
| HCF | Hedgehog Containment Facility |
| HCFA | Health Care Financing Administration |
| HCFC | Hydro-Chloro-Fluoro Carbon |
| HCG | Hide Codes Galore |
| HCG | Human Chorionic Gonadotropin |
| HCG | High Cholesterol Group |
| HCGS | Human Corneal Growth Supplement |
| HCI | Host Controller Interface |
| HCl | Hydrochloric Acid |
| HCL | Hardware Compatibility List |
| HCL | Hairy Cell Leukemia |
| HCL | Horizontal Centerline |
| HCL | Harvest Control List |
| HCL | Hummingbird Communications, LTD. |
| HCL | Hindustan Computers Limited |
| HCL | Hue, Chroma, and Luminance |
| HCL | Happy Clown Laughter |
| HCL | Hydrogenated Copyright Lawyer |
| HCM | Hypertrophic CardioMyopathy |
| HCM | Hard Copy Module |
| HCM | Hardware Configuration Management |
| HCMM | Hard Copy Module |
| HCMM | Heat Capacity Mapping |
| HCN | Health Communication Network |
| HCOM | Health Committee of Management |
| HCR | High Chief Ranger |
| HCR | High Cross Range |
| HCS | Human Capital Strategist |
| HCSL | Hybrid Computation and Simulation Laboratory |
| HCT | Hardware Compatibility Test |
| HCU | Hydraulic Charging Unit |
| HCV | Hepatitis C Virus |
| HCV | Hydrogen Check Valve |