Act or ACT may mean:

• Act of Parliament (Act of Congress in the USA) a statute or law passed by a legislature.
• Act , a British band
• Act , a document recording the legality of a transaction or contract
• Act , a segment of a performance, such as a play or opera
• Acting, action of an actor in a theatrical performance
• ACT , a college entrance examination
• ACT! is a customer relationship management (CRM) application
• Act , a type of web browser
• Australian Capital Territory, Australian seat of government
• Advanced Concepts Team, A Research Team of the European Space Agency
• Acceptance and Commitment Therapy, A psychological intervention
• Australian Cricket Team
• Act or S-act, the action of a monoid on a set, or a semiautomaton.

Acts or ACTS may mean:

• Acts of the Apostles, a genre of early Christian literature
• Acts of the Apostles, the fifth book in the Bible's New Testament
• Advanced Crew Transportation System
• Advanced Communication Test Satellite, a satellite launched in 1993 by the Shuttle
• Automated Coin Toll System
• ACTS Nederland BV Railfreight operators in the Netherlands

See also

• ACT

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