| HCDC | Hamilton County Development Company 
| Others |
| HCDC | Hamming Code Data Compression
| Others |
| HCDC | Hand Cut Double Cooked
| Others |
| HCDC | Hardin County Detention Center
| Others |
| HCDC | Harlem Community Development Corporation
| Others |
| HCDC | Hiersteiner Child Development Center
| Others |
| HCDC | High Cell Density Cultivations
| Others |
| HCDC | Highbridge Community Development Corporation
| Others |
| HCDC | Hillcrest Child Development Center
| Others |
| HCDC | Hillsborough County Developmental Center
| Others |
| HCDC | Holmes Cultural Diversity Center
| Others |
| HCDC | Housing and Community Development Commission
| Others |
| HCDC | Housing and Community Development Committee
| Others |
| HCDC | Housing Colonies Development Corporation
| Others |
| HCDC | Housing Community Development Commission
| Others |
| HCDC | Houston Community Data Connections
| Others |
| HCDC | Hudson County Department of Corrections
| Others |
| HCDC | Human Capacity Development Consultants
| Others |
| HCDC | Hunterdon County Democratic Committee
| Others |
| HCDC | Huron County Development Council
| Others |