C74

C74 or C-74 may be:


 * C-74 Globemaster, transport aircraft with transoceanic range
 * In lighting, a reversed clothespin used to hold gels and light screens in theatrical productions
 * Comiket 74, The 74th Comiket Convention in Japan
 * Ruy Lopez (Spanish Game) opening, Encyclopaedia of Chess Openings
 * Adrenal tumor ICD-10 code
 * Cycling '74, a software development company known for distributing Max/MSP
 * Caldwell 74 (NGC 3132, the Eight-Burst Nebula, or the Southern Ring Nebula), a planetary nebula in the constellation Vela