// Workers AI · dad joke modeWhat did SDR say to the radio wave? You're on the right frequency.

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

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

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