Cy, CY, or cy may refer to:
Cybercrime, or computer oriented crime, is crime that involves a computer and a network. The computer may have been used in the commission of a crime, or it may be the target.
Cyanobacteria , also known as Cyanophyta, are a phylum of bacteria that obtain their energy through photosynthesis, and are the only photosynthetic prokaryotes able to produce oxygen.
Cynthia Ann Stephanie Lauper (born June 22, 1953) is an American singer, songwriter, actress and LGBT rights activist.
Cystic fibrosis (CF) is a genetic disorder that affects mostly the lungs, but also the pancreas, liver, kidneys, and intestine.
Cyrus II of Persia (Old Persian: 𐎤𐎢𐎽𐎢𐏁 Kūruš; New Persian: کوروش Kuruš; Hebrew: כורש, Modern Kōréš, Tiberian Kōréš; c.
Cycling, also called bicycling or biking, is the use of bicycles for transport, recreation, exercise or sport.
The Cyrillic script is a writing system used for various alphabets across Eurasia, particularly in Eastern Europe, the Caucasus, Central Asia, and North Asia.