HDR may refer to: Science and technology Hard disk recorder, for digital audio or video HD Radio, digital audio broadcasting system High Data Rate, the previous name of Evolution-Data Optimized, a wireless telecommunications standard High Data Rate, a data rate defined in the InfiniBand communications standard High dynamic range, in audio or video High-dynamic-range rendering, in computer graphics High-dynamic-range imaging, in digital photography High-dynamic-range video, in video Homology directed repair, a DNA repair system in cells Hot dry rock, a form of geothermal energy production GATA3, a protein also named HDR Organizations HDR, Inc., an American architectural and engineering firm HevyDevy Records, a Canadian record label High Dive Records, an American record label Honicknowle Defence Regiment, a criminal organization from Honicknowle, Plymouth, England Places Hyderabad Junction railway station (station code), in Sindh, Pakistan Hadrian Road Metro station (station code), in England Other uses Habilitation à diriger des recherches (accreditation to supervise research), an academic qualification in France Human Development Report, an annual United Nations publication Humanitarian daily ration, an air-dropped ration for disasters See also Header (disambiguation) HDRS