| HDR | Database header (Pc-File+) 
| Others |
| HDR | Datafile (Egret)
| Others |
| HDR | Halt Den Rand
| Others |
| HDR | Hard Disk Recorder
| Others |
| HDR | Hard Disk Recording
| Others |
| HDR | Hard Drive Repeat
| Others |
| HDR | Hardware Design Review
| Others |
| HDR | Harnessing the Data Revolution
| Others |
| HDR | Havadarya Airport
| Others |
| HDR | Health Data Repository
| Others |
| HDR | Heparin Dose Response
| Others |
| HDR | Herr der Ringe
| Others |
| HDR | Hickory Daily Record
| Others |
| HDR | High Data Rate
| Others |
| HDR | High Definition Range
| Others |
| HDR | High Definition Recording
| Others |
| HDR | High Definition Rendering
| Others |
| HDR | High Definition Resolution
| Others |
| HDR | High Definition Resource
| Others |
| HDR | High Density Range
| Others |
| HDR | High Dose Radiation
| Others |
| HDR | High Dose Rate
| Others |
| HDR | High Dynamic Range
| Others |
| HDR | High Dynamic Ring
| Others |
| HDR | High-Dose Rate
| Others |
| HDR | Higher Degree Research
| Others |
| HDR | Highland Daytona Racing
| Others |
| HDR | Hillary Diane Rodham
| Others |
| HDR | Home Defense Revolver
| Others |
| HDR | Homology-Directed Repair
| Others |
| HDR | Hospital Discharge Register
| Others |
| HDR | Hospital Discharge Registry
| Others |
| HDR | Host Data Replicator
| Others |
| HDR | Hot Dry Rock
| Others |
| HDR | Hot Dry Rocks
| Others |
| HDR | Human Data Review
| Others |
| HDR | Human Development Report
| Others |
| HDR | Human Development Reports
| Others |
| HDR | Humanitarian Daily Ration
| Others |
| HDR | Humility, Discretion and Respect
| Others |
| HDR | Message header (Procomm Plus - 1st Reader)
| Others |