| HCA | Big Spring McMahon-Wrinkle Airport 
| Others |
| HCA | Big Spring, Texas USA
| Others |
| HCA | Halloween Costume Association
| Others |
| HCA | Hamilton Conservation Authority [Ontario, Canada]
| Others |
| HCA | Hamilton Construction Association
| Others |
| HCA | Hammer Call Analyzer
| Others |
| HCA | Handicap Children's Association
| Others |
| HCA | Hardware Configuration Audit
| Others |
| HCA | Hawaii Conservation Alliance
| Others |
| HCA | Hawaii Corvette Association
| Others |
| HCA | Hawthorne Christian Academy
| Others |
| HCA | Head of Contracting Activity
| Others |
| HCA | Health Care Administration
| Others |
| HCA | Health Care Agency
| Others |
| HCA | Health Care Aid
| Others |
| HCA | Health Care Assistant
| Others |
| HCA | Health Care Authority
| Others |
| HCA | Health Careers Academy
| Others |
| HCA | Health Consumer Alliance
| Others |
| HCA | healthcare assistant
| Others |
| HCA | Healthcare Certification Authority
| Others |
| HCA | Heartland Carwash Association
| Others |
| HCA | Heartland Corvette Association
| Others |
| HCA | Helping Celebrate Abilities
| Others |
| HCA | hepatocellular adenoma
| Others |
| HCA | HeteroCyclic Amine
| Others |
| HCA | Heterocyclic Amines
| Others |
| HCA | High capacity Air Ambulance
| Others |
| HCA | High Consequence Area
| Others |
| HCA | High Content Analysis
| Others |
| HCA | High Contrast Addressing
| Others |
| HCA | High Court of Australia
| Others |
| HCA | High Current Amplifier
| Others |
| HCA | Hill Climb Assist
| Others |
| HCA | Historic Car Art
| Others |
| HCA | Historic Cost Accounting (!)
| Others |
| HCA | Holiday Camp Association
| Others |
| HCA | Holloway Cut Advisor
| Others |
| HCA | Home Care Aide
| Others |
| HCA | Home Care Assistant
| Others |
| HCA | Homes and Communities Agency
| Others |
| HCA | homocysteic acid
| Others |
| HCA | Hopkinton Center for the Arts
| Others |
| HCA | Hospital Caterers Association (!)
| Others |
| HCA | Hospital Corporation Of America
| Others |
| HCA | Host Channel Adapter
| Others |
| HCA | Hotel Corporation of America
| Others |
| HCA | Housing Corporation Assessment
| Others |
| HCA | Houston Contractors Association
| Others |
| HCA | Hub Clamping Area
| Others |
| HCA | Humanitarian and Civic Assistance
| Others |
| HCA | Hungarian Cricket Association
| Cricket |
| HCA | Hybrid Capture Assay
| Others |
| HCA | Hybrid Cloud Assessment
| Others |
| HCA | Hybrid Code Analysis
| Others |
| HCA | Hydraulic Clutch Actuator
| Others |
| HCA | Hydro Citric Acid
| Others |
| HCA | Hydrostatic Clutch Actuator
| Others |
| HCA | Hydroxy Citric Acid
| Others |
| HCA | hydroxycitric acid and
| Others |
| HCA | Hypertrophic Cardiomyopathy Association
| Others |
| HCA | Hypo Clearing Agent
| Others |
| HCA | Hyundai Club Azerbaijan
| Others |
| HCA | Hyundai Colombia Automotriz
| Others |
| HCA | Hyundai Cyber Academy
| Others |
| HCA | State Health Care Authority
| Others |
| HCA | The High Court Of Australia
| Others |