HDR

HDR may refer to:

• HDR, Inc., an American architectural and engineering firm
• Hard disk recorder
• Hevy Devy Records, a record label
• High Dose Rate, a treatment technique in radiotherapy
• High dynamic range imaging, digital imaging
• High dynamic range rendering, 3D image rendering
• Higher Degree by Research, a term for postgraduate education
• Homology-directed repair, a DNA repair system in the cells of mammals
• Hot Dry Rock, an experimental form of geothermal energy production
• Human Development Report, an annual UN publication
• Humanitarian daily ration, an air-dropped ration for disasters
• Habilitation à Diriger des Recherches, higher doctorate in France
• High Data Rate, the original name for the 1xEV-DO radio communications system