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- Slovenian Democratic Youth (Slovene: Slovenska demokratska mladina, acronym SDM) is the youth section of the Slovenian Democratic Party (Slovene: Slovenska demokratska stranka, acronym SDS)
- Shoppers Drug Mart, a chain of Canadian pharmacies
- Standard Days Method, a calendar-based method of contraception
- Super Distance Matrix in cladistic analyses, particularly phylogenomics
- Site-directed mutagenesis (molecular biology)
- Standard Diameter Mast, windsurfing (48,5mm inner diameter)
- Sub-Divisional Magistrate, India
- System design and management, MIT's graduate program in management and engineering
- The Scarlet Devil Mansion, a popular setting in Touhou Project.
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