From Wikipedia, the free encyclopedia
- S1
- S1 (Berlin), a line on the Berlin S-Bahn
- S1 Invicta (car)
- Nikon Coolpix S1 digital camera
- First year in the Scottish education system
- Comet Ikeya-Seki, C/1965 S1
- A safety phrase, meaning "keep locked up"; see List of S-phrases.
- S1 MP3 Players
- S1 Scout Car, an armoured car built in Australia during the Second World War
- S1 (military), an administrative position within military units.
- S1, Carex elata sedge-swamp, one of the swamp and tall-herb fen communities of the British National Vegetation Classification
- first sacral vertebra in human anatomy, see vertebral column
- a microprocessor-core, see S1 Core
- S1 refers to the "lub" heart sound
- S1, an innovative duplex locomotive developed by the Pennsylvania Railroad
- S-1