| HRDC | Hansen Reynolds Dickinson Crueger 
| Others |
| HRDC | Harvard Radcliffe Dramatic Club
| Others |
| HRDC | Headwaters Regional Development Commission
| Others |
| HRDC | Health and Relationships During College
| Others |
| HRDC | Hellenic Regional Development Center
| Others |
| HRDC | Historic Racing Drivers Club
| Others |
| HRDC | Hollister Ranch Design Committee
| Others |
| HRDC | Hope Respect Dream Change
| Others |
| HRDC | Horticultural Research and Development Corporation
| Others |
| HRDC | Human Resource Department of Canada
| Others |
| HRDC | Human Resource Development Center
| Others |
| HRDC | Human Resource Development Centre
| Others |
| HRDC | Human Resource Development Corporation
| Others |
| HRDC | Human Resource Development Council
| Others |
| HRDC | Human Resources Department Canada
| Others |
| HRDC | Human Resources Development Canada
| Others |
| HRDC | Human Resources Development Center
| Others |
| HRDC | Human Resources Development Centre
| Others |
| HRDC | Human Resources Development Commission
| Others |
| HRDC | Human Resources Development Council
| Others |
| HRDC | Human Resources Development Councils
| Others |
| HRDC | Human Rights and Diversity Commission
| Others |
| HRDC | Human Rights Defense Center
| Others |
| HRDC | Human Rights Documentation Centre
| Others |
| HRDC | Hybrid Rice Development Consortium
| Others |