HDR

HDR may refer to:

Science and technology

• Hard disk recorder
• High-dynamic-range imaging, digital imaging
• High-dynamic-range rendering, an image rendering technique
• Homology-directed repair, a DNA repair system in the cells of mammals
• Hot dry rock, an experimental form of geothermal energy production
• High data rate, the original name for the 1xEV-DO radio communications system
• High dose rate, a treatment technique in radiotherapy

Other

• HDR, Inc., an American architectural and engineering firm
• Higher Degree by Research, in postgraduate education
• 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