SMM may refer to: Religion Company of Mary, a Roman Catholic missionary religious congregation Church of St. Mary Magdalene (Toronto), a church in Toronto, Canada Science Science Museum of Minnesota Single-molecule magnet S-Methylmethionine, a derivative of methionine Soft Magnetic Materials Conference Solar Maximum Mission or SolarMax, an artificial satellite Stepwise mutation model, of allelic frequencies Medicine Smouldering Multiple Myeloma Technology Scattering-matrix method, to solve Maxwell's equations Storage Modification Machine, a type of Pointer machine in computing System Management Mode, of a x86 CPU Maxwell (microarchitecture), a GPU microarchitecture Super Mario Maker, 2015 video game Social media marketing Other Master of Sacred Music Musasa language, ISO 639-3 code Semporna Airport, IATA code Sex Money Murda, a street gang in America Shanghai Metals Market, China Single monthly mortality, for prepayment of loan ORG, Known ORG Player OSCE Special Monitoring Mission to Ukraine