C4S
| Acronym | Definition |
|---|---|
| C4S | Carrera 4S (Porsche 911 model) |
| C4S | Centre for Sustainability (Transport Research Laboratory; UK) |
| C4S | Command, Control, Communications, and Computer Systems (US DoD) |
| C4S | Chondroitin-4 Sulfate |
| C4S | Computers 4 Seniors (Georgia) |
| C4S | Camille Cascode Constant Current Source (current limit circuit) |
| C4S | Clean for Stripper (band) |
| C4S | Classified Computer Configuration Control System |
| C4S | Command, Control, Communications, Computers, and Surveillance |
| C4S | Craig 4 Spokane (Spokane, WA) |