# SDR

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> Markdown URL: https://mediated.wiki/source/SDR.md
> Source: https://en.wikipedia.org/wiki/SDR
> Source revision: 1342846497
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

**SDR** or **sdr** may refer to:

## Science and technology

- [ETSI Satellite Digital Radio](/source/ETSI_Satellite_Digital_Radio), a European satellite radio standard
- [Selective dorsal rhizotomy](/source/Selective_dorsal_rhizotomy), a neurosurgery
- [Short-chain dehydrogenase](/source/Short-chain_dehydrogenase), a short-chain dehydrogenases/reductases family, or SDR family
- Single data rate, in [synchronous dynamic random-access memory](/source/Synchronous_dynamic_random-access_memory) (SDRAM)
- [SmartDraw](/source/SmartDraw), an image file format with the file extension .sdr
- [Software-defined radio](/source/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](/source/QRIO)
- [System of distinct representatives](/source/System_of_distinct_representatives), in mathematics
- [Sparse distributed representation](/source/Sparse_distributed_representation), in machine intelligence
- [Standard dimension ratio](/source/Standard_dimension_ratio), in pipe engineering
- [Standard-dynamic-range video](/source/Standard-dynamic-range_video), a video with a dynamic range that was standard before high-dynamic-range video
- [SDR (audio)](/source/SDR_(audio)), or super dynamic range, an audio cassette quality-control and duplication process

## Economics

- [Special drawing rights](/source/Special_drawing_rights), foreign-exchange reserve assets overseen by the IMF
- [Social discount rate](/source/Social_discount_rate), a measure of the value of diverting funds to social projects

## Media and entertainment

- Stardust Records, a [Stardust Promotion](/source/Stardust_Promotion) label
- [Süddeutscher Rundfunk](/source/S%C3%BCddeutscher_Rundfunk), a former public broadcaster in Germany, then merged into Südwestrundfunk (SWR)
- *[Swiss Derivatives Review](/source/Swiss_Derivatives_Review)*, a magazine for the futures and options industries

## Military

- [Strategic Defence Review (disambiguation)](/source/Strategic_Defence_Review_(disambiguation)), of the UK Ministry of Defence
- [System design review](/source/System_design_review), of a program

## Places

- [School District of Reedsburg](/source/School_District_of_Reedsburg)
- [Somali Democratic Republic](/source/Somali_Democratic_Republic)
- [Southern Distributor Road](/source/Southern_Distributor_Road), Newport, Wales
- [South Devon Railway (heritage railway)](/source/South_Devon_Railway_(heritage_railway)), Devon, England (National Rail code: SDR)
- [Santander Airport](/source/Santander_Airport), Cantabria, Spain (IATA airport code: SDR)

## Other uses

- [Sales development representative](/source/Sales_development_representative)
- [Oraon Sadri language](/source/Oraon_Sadri_language) (ISO 639-3 code: sdr)

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Adapted from the Wikipedia article [SDR](https://en.wikipedia.org/wiki/SDR) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/SDR?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.