C33 or C-33 may refer to : * Autopista C-33, a highway in Catalonia, Spain * Boeing C-33, military designation for the proposed Boeing 747-400F * Douglas C-33, military designation for the Douglas DC-2 * HMS C33 (1910), a British submarine * C33 Laurel, a Nissan automobile mode * Caldwell 33, the eastern branch of the Veil Nebula, a supernova remnant in the constellation Cygnus * Canal 33, alternate name for El 33, a Catalan-language television channel * C33, code for the King's Gambit Accepted in the Encyclopaedia of Chess Openings * "C.3.3.", the number of Oscar Wilde's cell in Reading Gaol, and the pseudonym under which his poem "The Ballad of Reading Gaol" was published * C33, ICD-10 code for Head and neck cancer This disambiguation page lists articles associated with the sam