Science:
- Science Museum of Minnesota, USA
- Single-molecule magnets, a class of metalorganic compounds
- S-Methylmethionine, a derivative of methionine
- Soft Magnetic Materials Conference, an international conference
- Solar Maximum Mission or SolarMax, an artificial satellite launched in 1980
- Stepwise Mutation Model: model for the length of a microsatellite as proposed by Tomoko Ohta and Motoo Kimura
- Sustainable Materials Management, a systemic approach to using and reusing materials more productively over their entire lifecycles