SDR or sdr may refer to:
Science and technology ETSI Satellite Digital Radio, a European satellite radio standard Selective dorsal rhizotomy, a neurosurgery Short-chain dehydrogenase, a short-chain dehydrogenases/reductases family, or SDR family Single data rate, in synchronous dynamic random-access memory (SDRAM) SmartDraw, an image file format with the file extension .sdr Software-defined radio, enabling computers to tune a wide spectrum of radio frequencies, using software instead of hardware for modulation and demodulation Sony Dream Robot, later dubbed QRIO System of distinct representatives, in mathematics Sparse distributed representation, in machine intelligence Standard dimension ratio, in pipe engineering Standard-dynamic-range video, a video with a dynamic range that was standard before high-dynamic-range video SDR (audio), or super dynamic range, an audio cassette quality-control and duplication process
Economics Special drawing rights, foreign-exchange reserve assets overseen by the IMF Social discount rate, a measure of the value of diverting funds to social projects
Media and entertainment Stardust Records, a Stardust Promotion label Süddeutscher Rundfunk, a former public broadcaster in Germany, then merged into Südwestrundfunk (SWR) Swiss Derivatives Review, a magazine for the futures and options industries
Military Strategic Defence Review (disambiguation), of the UK Ministry of Defence System design review, of a program
Places School District of Reedsburg Somali Democratic Republic Southern Distributor Road, Newport, Wales South Devon Railway (heritage railway), Devon, England (National Rail code: SDR) Santander Airport, Cantabria, Spain (IATA airport code: SDR)
Other uses Sales development representative Oraon Sadri language (ISO 639-3 code: sdr)
See also