3C may refer to:

In astronomy:

• 3C, the Third Cambridge Catalogue of Radio Sources, an astronomical reference series

In business:

• Long March 3C, a 2008 Chinese orbital rocket
• 3C Records, a record label
• 3C (radio), a defunct digital radio station
• Team 3C Casalinghi Jet Androni Giocattoli, a defunct Italian professional cycling team
• 3C, the IATA code for defunct American airline RegionsAir
• Three-cent piece
• 3C (trade association) is an American trade association.

In computing:

• Three Cs (Compulsory, Capacity, and Conflict), three categories of CPU cache misses
• 3C, or Computer Control Company, Inc., a pioneering minicomputer company (1953–1966)
• Agile model: 3C (Card, Conversation, Confirmation)
• 3C, an abbreviation often used in Taiwan for "computer, communication, and consumer electronics"

In genetics:

• Alpha-tubulin 3C, a human gene
• 3C, or Chromosome conformation capture, a technique used in molecular biology

Substituted amphetamines (2C family analogues):

• 3C-G (Ganesha) with homologues
• 3C-BZ
• 3C-P
• 3C-E

In places:

• Stalag III-C, a German Army World War II POW camp for Allied soldiers near Alt-Drewitz

See also[edit]

• C3 (disambiguation)
• List of pages with prefix 3C