- ACT stands for American College Test
- ACT stands for Active
- ACT stands for American College Testing
- ACT stands for Activity
- ACT stands for Actual
- ACT stands for Arms Control Today (magazine)
- ACT stands for Action by Churches Together
- ACT stands for Active (Telabs)
- ACT stands for Australian Capital Territory (Australian state/territory)
- ACT stands for Actual (Sprint)
- ACT stands for Actor
- ACT stands for American Council for Technology
- ACT stands for Ancestors
- ACT stands for Activation
- ACT stands for Active Control Technology
- ACT stands for Application Compatibility Toolkit
- ACT stands for Allied Command Transformation
- ACT stands for Assertive Community Treatment
- ACT stands for America Coming Together
- ACT stands for Acceptance and Commitment Therapy (clinical psychology)
- ACT stands for Advanced Clutch Technology (automobile)
- ACT stands for American Conservatory Theater (Repertory Theatre Company In San Francisco, CA)
- ACT stands for Association for Competitive Technology
- ACT stands for Action Tracking
- ACT stands for Action for Children’s Television
- ACT stands for Assessment and Care Team (various locations)
- ACT stands for Amazon Conservation Team
- ACT stands for Alliance for Coastal Technologies (NOAA funded partnership)
- ACT stands for About Clinical Trials
- ACT stands for Advisory Committee on Technology (various organizations)
- ACT stands for Academy of Cognitive Therapy (est. 1996)
- ACT stands for Accounting Division
- ACT stands for Anglican Church of Tanzania
- ACT stands for Anti-Car Theft
ACT