3C

3C may refer to:

In astronomy:

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

In business:

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

In computing:

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

In genetics:

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

Substituted amphetamines (3C (psychedelics) 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

In internet memes:

• Three Chefs