Cy

Cy, CY, or cy may refer to:

People

 * Cy (given name)

Fictional characters

 * Cy, a Cylon in the final episode ("The Return of Starbuck") of the television series Galactica 1980
 * Cy the Cardinal, mascot of Iowa State University
 * Cy, mascot of the Pee Dee Cyclones minor league ice hockey team based in Winston-Salem, North Carolina
 * Cy, O'Hare Air delivery guy from The Lorax movie
 * Cy, from the "'Zobooland'" segment of Zoboomafoo

Codes

 * Cyprus ISO 3166-1 alpha-2, FIPS Pub 10-4 and obsolete NATO country code
 * .cy, Cyprus Internet country code top-level domain (ccTLD)
 * Cyprus Airways IATA airline designator
 * Cymraeg, otherwise known as the Welsh language ISO 639-1 language code

In science and technology

 * Cubic yard
 * In BIOS setup, number of cylinders in cylinder-head-sector (CHS) hard disk drive access method
 * Cyclohexyl group, in organic chemistry
 * Cyclophosphamide, an alkylating agent used in therapy for cancer and some autoimmune diseases
 * Samokhodnaya Ustanovka (Russian: самоходная установка), a range of Soviet self-propelled carriages
 * Cypress Semiconductor (NASDAQ stock symbol)
 * Cy, a code for cyanine dyes

Other uses

 * Calendar year
 * Common year
 * Common Year (Greyhawk)
 * Chandrayaan programme