CS1
| Acronym | Definition |
|---|---|
| CS1 | Counter Strike 1 (video game) |
| CS1 | Computer Science 1 (class) |
| CS1 | Community Server 1 (internet) |
| CS1 | Concurrent Session 1 |
| CS1 | Community School #1 (Mission Hills, KS; elementary school) |
| CS1 | Commissaryman First Class (Naval Rating) |