- Combat Support Hospital , a military medical unit
- C Shell , a Unix shell
- Context Sensitive Help , method of providing online help
- Computer Science House , a special interest house at Rochester Institute of Technology
- Coordination Syndical Haitien, the Haitian Trade Union Coordination
- Council For Secular Humanism
- Canadian Subject Headings is a list of subject headings of Canadian topics
- Chartwell Seniors Housing , a real estate investment trust in Canada
- Cold Spring Harbor Laboratory , a genetics laboratory in Cold Spring Harbor
- Cold Spring Harbor , a town in Long Island, New York
- CSH is the ICAO Airline Designator for Shanghai Airlines , China
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