2C

2C or II-C may refer to:
* 2C (psychedelics), a family of psychedelic phenethylamines
* Alpha-2C adrenergic receptor in biochemistry
* Char 2C, a French heavy tank developed during WWI, but never deployed in combat
* Long March 2C, a Chinese rocket
* Oflag II-C, a World War II German Army Prisoner-of-war camp located near Woldenburgand also :
* Second Cambridge Catalogue of Radio Sources
* Two's complement, a system for representing signed integers on computers