ATCA

ATCA may refer to:

• Atça, a town in Turkey
• Advanced Telecommunications Computing Architecture, a specification for communications equipment
• Aid to the civil authority, military aid to the civil power
• Alien Tort Claims Act, a U.S. statue on jurisdiction
• All Tripura Chess Association, an Indian organisation
• American Theatre Critics Association
• Association of Turkish Cypriots Abroad
• Australia Telescope Compact Array, a radio telescope in New South Wales