1S
Look up ones in Wiktionary, the free dictionary.
1S or 1s may refer to:
- 1s electron, in an atomic orbital
- Sabre (computer system)'s IATA code
- 1S, a series of Toyota S engines
- SSH 1S (WA); see Washington State Route 502, Washington State Route 503
- One shilling (British coin)
See also
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