TCAP

• Acetone peroxide, the trimer version tri-cyclic acetone peroxide, a high explosive
• Telethonin, a protein encoded by the TCAP gene

• Tennessee Comprehensive Assessment Program, a public school standardized testing program
• Transitional Colorado Assessment Program, a public school standardized testing program that replaced the Colorado Student Assessment Program

• Tax Credit Assistance Program, a U.S. federal housing grant program
• Thanachart Capital PCL (stock ticker: TCAP), the holding company of TBank, the Thanachart Bank

• Taipei Children's Amusement Park, an amusement park in Taipei, Taiwan
• To Catch a Predator, American reality television news segment of Dateline NBC, which used hidden cameras to catch child sex predators
• Transaction Capabilities Application Part (ITU-T Q.771-Q.775 or ANSI T1.114) a protocol to allow multiple simultaneous dialogs on the same subsystem
• Catholic Tercio of Political Action Party (Spanish: TCAP) a local political party in Madrid in 2007, see Results breakdown of the 2007 Spanish local elections (Community of Madrid)

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• {{in title|plural=yes|TCAP}}
• Traverse City Area Public Schools (TCAPS)

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