C17
# C17

C17, C-17 or C.17 may refer to:

## Transportation

* HMS C17, a 1917 British C-class submarine

### Air

* Boeing C-17 Globemaster III, a military transport aircraft
* Lockheed Y1C-17 Vega, a six-passenger monoplane
* Cierva C.17, a 1928 English experimental autogyro

### Land

* C-17 highway (Spain) also known as Eix del Congost, a primary highway in Catalonia
* Queensland C17 class locomotive
* Sauber C17, a 1998 Formula One car

## Science and technology

* C17 (C standard revision), an informal name for ISO/IEC 9899:2018, the most recent standard for the C programming language
* C17, a female two-pole IEC 60320 electrical cable connector that mates with a male C18 appliance inlet
* Caldwell 17, a dwarf spheroidal galaxy of the Local Group in the constellation Cassiopeia
* Carbon-17 (C-17 or $^{17}C),$ an isotope of carbon
* C17, a 17-Carbon molecule in chlorophyll metabolism
   * Precorrin-3B C17-methyltransferase, an enzyme involved in that metabolism
* Small intestine cancer (ICD-10 code)

## Other uses

* City 17, a fictional location in the Half-Life universe
* French Defence (Encyclopaedia of Chess Openings code)
* 17th century
* Android 17, character from Dragon Ball Franchise
