C66
C66 stands for:
- Chrysler C66 , a 1954 passenger car model
- HMS Uganda (C66) , an originally British, later Canadian military ship
- Ureteral cancer , ureteral cancer according to the ICD-10 code
- ECO key for the improved Steinitz defense, see Spanish game # Steinitz defense
- Caldwell 66 , a globular cluster from the Caldwell catalog
