SDSS may refer to:
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Sloan Digital Sky Survey
The Sloan Digital Sky Survey or SDSS is a major multi-spectral imaging and spectroscopic redshift survey using a dedicated 2.5-m wide-angle optical telescope at Apache Point Observatory in New Mexico, United States. The project began in 2000 a ...
, a major multi-filter imaging and spectroscopic redshift survey
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Social Democratic Party of Slovakia
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Spatial Decision Support System, a GIS based decision aiding system
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Independent Democratic Serb Party, a political party of Croatian Serbs (''Samostalna demokratska srpska stranka'' in Serbo-Croatian)
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South Delta Secondary School, a school in Delta, British Columbia, Canada
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