| Acronym | Definition |
|---|
| ACT | A Contemporary Theatre |
| ACT | A-Changin' Times |
| ACT | AIDS Counseling and Training |
| ACT | About Clinical Trials |
| ACT | Absolute Congestion Threshold |
| ACT | Abuse Counseling and Treatment, Inc. |
| ACT | Academy of the Company Theatre |
| ACT | Acceptance and Commitment Therapy |
| ACT | Access Charge Terminal |
| ACT | Access Control Table |
| ACT | Access Control Technologies, Inc. |
| ACT | Account Contact Tool |
| ACT | Account Control Table |
| ACT | Accounting Division |
| ACT | Accounting, Consulting & Training |
| ACT | Accumulated Cell Time |
| ACT | Accurate Complete Timely |
| ACT | Acoustic Charge Transport |
| ACT | Acoustical Ceiling Tile |
| ACT | Acquisition Coordinating Team |
| ACT | Acquisition Coordination Team |
| ACT | Action Collaboration Team |
| ACT | Action Tracking |
| ACT | Action by Churches Together |
| ACT | Action for Children's Television |
| ACT | Action for Conservation through Tourism |
| ACT | Activated Clotting Time |
| ACT | Activated Complex Theory |
| ACT | Activation |
| ACT | Activator of CREM in Testis |
| ACT | Active |
| ACT | Active Charge Transport |
| ACT | Active Citizenship Today |
| ACT | Active Control Technique |
| ACT | Active Control Technology |
| ACT | Activities, Contacts, Time |
| ACT | Activity |
| ACT | Activity Bit |
| ACT | Activity Coordination Team |
| ACT | Actor |
| ACT | Actual |
| ACT | Actual Control Technology |
| ACT | Actual Cost of Testing |
| ACT | Actual Cycle Time |
| ACT | Acyl-CoA Thioester Hydrolase |
| ACT | Adaptive Client Technology |
| ACT | Adaptive Computing Technology |
| ACT | Adaptive Control of Thought |
| ACT | Additional Centre Tank |
| ACT | Aden Container Terminal |
| ACT | Administrative Council Team |
| ACT | Adult Crime Tactics |
| ACT | Advance Computer Technology |
| ACT | Advance Corporate Tax |
| ACT | Advance Corporate Training Ltd. |
| ACT | Advance Corporation Tax |
| ACT | Advanced CMOS, TTL Compatible |
| ACT | Advanced Capability Tanker |
| ACT | Advanced Carbide Test |
| ACT | Advanced Cargo Transport |
| ACT | Advanced Cell Technology Inc. |
| ACT | Advanced Channelized Transmission |
| ACT | Advanced Clutch Technology |
| ACT | Advanced Coating Technology |
| ACT | Advanced Communication Technology |
| ACT | Advanced Communications Transceiver |
| ACT | Advanced Component Technologies, Inc. |
| ACT | Advanced Composites Technology |
| ACT | Advanced Computer Techniques, Inc |
| ACT | Advanced Computer Technology |
| ACT | Advanced Concept Technology |
| ACT | Advanced Concepts Team |
| ACT | Advanced Concepts Test |
| ACT | Advanced Concepts and Technologies International, LLC |
| ACT | Advanced Concepts and Technology |
| ACT | Advanced Configuration Tool |
| ACT | Advanced Conversion Technology |
| ACT | Advanced Cordless Technologies |
| ACT | Advanced Core Test |
| ACT | Advanced Corporate Tax |
| ACT | Advanced Corporation Tax |
| ACT | Advanced Countermeasure Technique(s) |
| ACT | Advanced Customer Testing |
| ACT | Advantage Coaching and Training |
| ACT | Advertising Club of Toronto |
| ACT | Advisory Committee on Technology |
| ACT | Advocacy, Communications, and Training |
| ACT | African Conservation Trust |
| ACT | African-American Collective Theater |
| ACT | Agape Copeland Train |
| ACT | Agenda for Children Tomorrow |
| ACT | Agents Council for Technology Act |
| ACT | Aid for College Tuition |
| ACT | Air Cargo Terminal |
| ACT | Air Charge Temperature |
| ACT | Air Cherenkov Telescope |
| ACT | Air Combat Tactics |
| ACT | Air Contract Transportation Tag |
| ACT | Air Control Team |
| ACT | Air Correlation Tracker |
| ACT | Airborne Communications Technician |
| ACT | Airborne Communications Terminal |
| ACT | Aircrew Combative Training |
| ACT | Aircrew Coordination Training |
| ACT | Alabama Contemporary Theater |
| ACT | Alabama–Coosa–Tallapoosa River Basin Compact |
| ACT | Alachua Conservation Trust |
| ACT | Algebraic Compiler and Translator |
| ACT | All Century Team |
| ACT | All Children Together |
| ACT | Allentown College Theater |
| ACT | Alliance for Cannabis Therapeutics |
| ACT | Alliance for Children and Television |
| ACT | Alliance for Coastal Technologies |
| ACT | Alliance for Community Transformation |
| ACT | Alliance for Competitive Telecommunications |
| ACT | Alliance for Conflict and Transformation |
| ACT | Alliance for Converging Technologies |
| ACT | Alliance of Concerned Teachers |
| ACT | Allied Command Transformation |
| ACT | Alternate Cover Test |
| ACT | Alternating Current Transformer |
| ACT | Alternative Construction Technologies, Inc. |
| ACT | Alternative Control Technology |
| ACT | Altitude Compensated Tilt |
| ACT | Aluminum Clay Tool |
| ACT | Amarillo City Transit |
| ACT | Amazon Conservation Team |
| ACT | America Coming Together |
| ACT | American Cabaret Theatre |
| ACT | American Cell Technology |
| ACT | American College Test |
| ACT | American College Testing |
| ACT | American College of Theriogenologists |
| ACT | American Combat Teams |
| ACT | American Conservatory Theater |
| ACT | American Corporations for Thailand |
| ACT | American Council for Technology |
| ACT | Americans for Competitive Telecommunications |
| ACT | Americans for Conservative Training |
| ACT | Anagram and Copy Treatment |
| ACT | Analog Cordless Telecommunications |
| ACT | Analysis Compliance & Training |
| ACT | Analysis Control Team |
| ACT | Analysis of Complexity Tool |
| ACT | Analyst Control Terminal |
| ACT | Analytical Cold Trap |
| ACT | Analytical Coordinated Team |
| ACT | Ancestors |
| ACT | Annual Change Traffic |
| ACT | Anti-Car Theft |
| ACT | Apache Crew Trainer |
| ACT | Apollo Civic Theatre |
| ACT | Apologetics Coordination Team |
| ACT | Apple Certified Trainer |
| ACT | Application Center for Technology |
| ACT | Application Centric Terminal |
| ACT | Application Compatibility Toolkit |
| ACT | Applied Cable Technologies |
| ACT | Applied Computerized Telephony |
| ACT | Applied Creative Technologies |
| ACT | Approach Control Tower |
| ACT | Aqueous Catch Tank |
| ACT | Arbre À Cames En Tête |
| ACT | Architecture Characterization Template |
| ACT | Arctic Cat Technology |
| ACT | Arkansas CAMA Technology, Inc |
| ACT | Armored Cavalry Trainer |
| ACT | Arms Control Today |
| ACT | Aromatherapy Conference Tours |
| ACT | Arte, Color Y Texto |
| ACT | Artemisinin-Based Combination Therapy |
| ACT | Artist Trading Card |
| ACT | Arts & Culture Trust |
| ACT | Asociación de Clubes de Traineras |
| ACT | Asociación de Cooperación Tecnica |
| ACT | Assertive Community Treatment |
| ACT | Assisted Communication Transactions |
| ACT | Associated Conservatives of Texas |
| ACT | Association for Children's Palliative Care |
| ACT | Association for Citizenship Teaching |
| ACT | Association for Commuter Transportation |
| ACT | Association for Competitive Technology |
| ACT | Association of Christian Therapists |
| ACT | Association of Civilian Technicians |
| ACT | Association of Classroom Teachers |
| ACT | Association of Cleaning Technicians |
| ACT | Association of Commercial Television in Europe |
| ACT | Association of Consumers and Taxpayers |
| ACT | Association of Corporate Treasurers |
| ACT | Association pour l'Amélioration des Conditions de Travail |
| ACT | Asynchronous Control Transfer |
| ACT | At-Risk Adult Crime Tactics |
| ACT | Atmospheric Chemical-Transport |
| ACT | Atmospheric Corrosion Testing |
| ACT | Attack Cycle Timeline |
| ACT | Attitude Control Thrusters |
| ACT | Augmented Catalytic Thruster |
| ACT | Australian Capital Territory |
| ACT | Auto Club Turkey |
| ACT | Automated Confirmation Transaction Service |
| ACT | Automated Control of Trainees |
| ACT | Automated Coordinate Transfer |
| ACT | Automatic Calibration using Transmitting signals |
| ACT | Automatic Call Tracking |
| ACT | Automatic Cobb Tester |
| ACT | Automatic Code Translator |
| ACT | Automatic Custody Transfer |
| ACT | Autoridad de Carreteras y Transportación |
| ACT | Average Cycle Time |
| ACT | Axial Computed Tomography |
| ACT | Waco, TX, USA - Madison Cooper |
