SDR
SDR may refer to:
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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 computers 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