| Acronym | Definition |
|---|
| TCOS➣The Chamber of Secrets (Harry Potter) |
| TCOS➣The Chronicles of Spellborn (game) |
| TCOS➣Technical Committee on Operating Systems |
| TCOS➣Thin Client Operating System |
| TCOS➣Telesec Chipcard Operating System |
| TCOS➣Tactical Combat Operations System |
| TCOS➣Total Coronary Obstructive Syndrome |
| TCOS➣Traction Control Override Switch |
| TCOS➣The Caves of Steel (novel) |
| TCOS➣Traveling Class Of Service |
| TCOS➣Team Communication and Organization System |