CSM
- Apollo command and service module
- C.S. Murugabhoopathy
- CARICOM Single Market and Economy
- CSM N.V.
- Calcutta School of Music
- Camborne School of Mines
- Canadian Ski Marathon
- Canadian Society of Medievalists
- Cantigas de Santa Maria
- Castleton Moor railway station
- Catalyst 6500
- Central Saint Martins
- Central Sierra Miwok
- Centro Sportivo Maruinense
- Cerebrospinal meningitis
- Certified software manager
- Chainsaw Man
- Chaos Space Marines
- Chartered Semiconductor Manufacturing
- Chateau Ste. Michelle
- Chopped strand mat
- Christian Socialist Movement
- Cigarette Smoking Man
- Colegio Suizo de México
- College of Saint Mary
- College of San Mateo
- College of Southern Maryland
- Colorado School of Mines
- Command Sergeant Major
- Committee on Safety of Medicines
- Common Sense Media
- Community Climate System Model
- Company sergeant major
- Compatibility Support Module
- Computational science
- Conspicuous Service Medal
- Content storage management
- Continuous shuffling machine
- Cork School of Music
- Cortical stimulation mapping
- Creation Science Movement
- Crop simulation model
- Ethereum
- Eve Online
- Google Cloud Platform
- High Council of the Judiciary (Italy)
- Hypalon
- IBM Power Systems
- Informix
- Kwang Soo Kim
- Scientific Centre of Monaco
- Scrum (software development)
- Shivaji
- Society of the Sacred Mission
- Solid mechanics
- Tatsuki Fujimoto
- The Christian Science Monitor
- Union of the Committees of Soldiers' Mothers of Russia