| Rank | Abbreviation | Meaning |
|---|
| ***** | HDRC | Hillary Diane Rodham Clinton
| |
| **** | HDRC | Housing and Dementia Research Consortium
| |
| **** | HDRC | Half-Duplex Relay Channel
| |
| **** | HDRC | Historic and Design Review Committee
| |
| *** | HDRC | Henan Development Reform Commission
| |
| *** | HDRC | Highspeed Dual Role Controller
| |
| *** | HDRC | Hugh Dillon Redemption Choir
| |
| *** | HDRC | Historic District Review Committee
| |
| ** | HDRC | Humanitarian Daily Rations Capabilities
| |
| ** | HDRC | Humanitarian Development Resource Centre
| |
| ** | HDRC | Human Development Resource Centre
| |
| ** | HDRC | Housing and Demographics Research Center
| |
| ** | HDRC | Historic District Ricts Council
| |
| ** | HDRC | Historic and Design Review Commission
| |
| * | HDRC | Heavy Duty Roller Conveyor
| |
| * | HDRC | Hawaii Disability Rights Center
| |
| * | HDRC | Human Development Resource Council
| |
| * | HDRC | Health Data Resource Center
| |
| * | HDRC | High Dynamic Range CMOS
| |
| * | HDRC | Higher Degrees Research Committee
| |
| * | HDRC | Help Desk Resolution Center
| |
| * | HDRC | High Dynamic Range Camera
| |
| * | HDRC | Hope District Recreation Commission
| |
| * | HDRC | Horley and District Riding Club
| |
| * | HDRC | Hardware Data Recovery Company
| |