SM
- .sm
- Citroën SM
- James Edward Smith (botanist)
- List of mine warfare vessels of the United States Navy
- List of taxonomic authorities named Smith
- Magellanic spiral
- Medal of Service of the Order of Canada
- S.M. (patient)
- SM (motorcycle)
- SM EVM
- SM Entertainment
- SM Prime
- SM Supermalls
- SM postcode area
- SM radar
- SM-class minesweeper
- SM-liiga
- SM-sarja
- SOMUA SM
- Sacrifice Medal
- Sadomasochism
- Samarium
- Samoan language
- San Marino
- Satu Mare
- Saviem SM
- Savoia-Marchetti
- Scientiæ Magister
- Scrum master
- Selective mutism
- Sena Medal
- Senior management
- Service mark symbol
- Service member
- Shanghai Metro
- Sm gauge
- Social media
- Society of Mary (Marianists)
- Southern Cross Medal (1952)
- Southern Cross Medal (1975)
- Spec Miata
- Spesmilo
- Spirit of Manila Airlines
- St. Mary's Railroad
- Stage manager
- Standard Missile
- Stephen Malkmus
- Streaming Multiprocessor
- Strength of materials
- Studio manager
- Suomen mestaruus
- Super Mario
- Supplementary Member
- Swedish Championship (disambiguation)
- Swedline Express
- Syndicat de la Magistrature