COK

Cok is a three-letter string that can refer to several unrelated topics. The most widely recognized use is as the IATA airport code COK for Cochin International Airport, located at Nedumbassery near Kochi in Kerala, India. The airport serves as a major international and domestic gateway for the region and is notable for being the first airport in India to be powered entirely by solar energy, as well as for its public-private partnership model.

In onomastics, Cok appears as a given name or nickname in Indonesian and Malay-speaking communities, where it may function as a short form of longer names or as a standalone personal name.

As an acronym or code, COK may appear in various domain-specific contexts, but such usages are not standardized and are highly dependent on the field or organization involved.