SMM

SMM may refer to:

Religion

 * 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
 * Santa Monica Mountains, the area that includes the Santa Monica Mountains National Recreation Area
 * Semporna Airport, IATA code
 * Sex Money Murda, a street gang in the Eastern United States
 * Shanghai Metals Market, China
 * Single monthly mortality, for prepayment of loan
 * OSCE Special Monitoring Mission to Ukraine