SDR

SDR may refer to:

Science and technology

• ETSI Satellite Digital Radio
• Selective dorsal rhizotomy, a neurosurgery
• Short-chain dehydrogenase, short-chain dehydrogenases/reductases family, SDR family
• Single data rate, in synchronous dynamic random-access memory (SDRAM)
• SmartDraw image file format, with file extension .sdr
• Software-defined radio, enabling PCs to tune a wide spectrum of radio frequencies, using software instead of hardware for modulation and demodulation
• Sony Dream Robot, later dubbed QRIO
• Sparse distributed representation, in machine intelligence
• Standard dimension ratio in pipe engineering
• Standard-dynamic-range video, color clarity and realism in images and videos, the current standard for video and cinema displays
• Super Dynamic Range, SDR (audio) or XDR, an encoding system for audio cassettes
• System of distinct representatives, in mathematics

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, 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, of the UK MoD
• System Design Review of a program, US

Places

• Santander Airport (IATA airport code)
• Somali Democratic Republic
• Southern Distributor Road, Newport, Wales

Other uses

• Sales development representative
• School District of Reedsburg
• South Devon Railway, a heritage railway in England