| ACT | actual | 实际的；真实的 |
| ACT | Active Control Technology | 主动控制技术 |
| ACT | Associated Container Transportation Ltd. [UK] | 联合集装箱运输公司 |
| ACT | Advisory Council on Technology | 技术咨询委员会 |
| ACT | advance corporation tax | 预扣公司税 |
| ACT | Activation hemoglutination time | 激活凝血时间 |
| ACT | Action Game | 动作游戏 |
| ACT | Automatic Computer Testing | 自动计算机测试 |
| ACT | Air Charge Temperature | 进气温度 |
| ACT | Analogical Circuit Technique | 模拟电路技术 |
| ACT | Anti-Comet Tail | 抗彗星尾光(电子枪) |
| ACT | Autocoder to COBOL Translator | (通用商业语言)翻译程序自动编码器 |
| ACT | Association of Classroom Teachers | 课堂教师协会 |
| ACT | Association of Civilian Technicians | 文职技术人员协会 |
| ACT | Association for Citizenship Teaching (UK) | 公民教育协会（英国） |
| ACT | Association of Commercial Television in Europe (Brussels, Belgium) | 欧洲商业电视协会（比利时布鲁塞尔） |
| ACT | Association for Children's Palliative Care (Bristol, UK) | 孩子们的临终关怀协会,英国布里斯托尔 |
| ACT | Association of Christian Therapists | 基督教治疗师协会 |
| ACT | Approach Control Tower (aviation) | 进近控制塔（航空） |
| ACT | Atmospheric Chemical-Transport | 大气化学运输 |
| ACT | Advanced Concepts Team (European Space Agency) | 先进概念团队（欧洲航天局） |
| ACT | Applied Creative Technologies | 应用创新技术 |
| ACT | Association of Corporate Treasurers | 英国企业财务长公会 |
| ACT | Advanced Concepts and Technologies International, LLC | 先进概念与技术国际有限责任公司 |
| ACT | Adaptive Control of Thought | 思维的自适应控制 |
| ACT | Activated Clotting Time | 活化凝血时间 |
| ACT | Advanced Component Technologies, Inc. | 先进组件技术公司。 |
| ACT | Arkansas CAMA Technology, Inc (Hot Springs, AR) | 阿肯色州CAMA技术公司（Arkansas CAMA Technology，Inc，Hot Springs，AR） |
| ACT | Actual Cycle Time | 实际循环时间 |
| ACT | Action for Children's Television | 为孩子们的行动电视节目 |
| ACT | Advanced Cell Technology Inc. (cloning research company) | Advanced Cell Technology Inc.（克隆研究公司） |
| ACT | Agents Council for Technology Act (insurance; ecommerce) | 技术代理委员会法案（保险；电子商务） |
| ACT | Analysis Control Team | 分析控制小组 |
| ACT | Air Control Team | 空气控制小组 |
| ACT | American College Testing | 美国大学考试 |
| ACT | America Coming Together | 美国走到一起 |
| ACT | Advance Computer Technology (Program) | 高级计算机技术（程序） |
| ACT | Automated Control of Trainees | 学员的自动控制 |
| ACT | Assisted Communication Transactions | 辅助通信事务 |
| ACT | Alliance for Children and Television (Canada) | 儿童与电视联盟（加拿大） |
| ACT | Atmospheric Corrosion Testing | 大气腐蚀试验 |
| ACT | Advanced Communication Technology | 先进通信技术 |
| ACT | American Combat Teams | 美国战斗队 |
| ACT | About Clinical Trials | 关于临床试验 |
| ACT | Advanced Concept Technology | 先进概念技术 |
| ACT | Adaptive Client Technology (Rockwell) | 自适应客户端技术（罗克韦尔） |
| ACT | African Conservation Trust | 非洲保护信托基金 |
| ACT | Advanced Cargo Transport | 高级货物运输 |
| ACT | Acquisition Coordination Team | 采办协调小组 |
| ACT | Air Correlation Tracker | 空气相关跟踪器 |
| ACT | A Contemporary Theatre (Seattle, WA, USA) | 当代剧院（美国华盛顿州西雅图） |
| ACT | Air Charge Temperature (automotive sensor) | 充气温度（汽车传感器） |
| ACT | Advance Corporate Training Ltd. | Advance企业培训有限公司。 |
| ACT | Airborne Communications Terminal | 机载通信终端 |
| ACT | Action by Churches Together | 教会共同行动 |
| ACT | Advanced Coating Technology (for chemical resistant labels) | 先进的涂层技术（用于耐化学标签） |
| ACT | Advanced Corporate Tax | 预付公司税 |
| ACT | Advanced CMOS, TTL Compatible (integrated circuit type description) | 高级CMOS，TTL兼容（集成电路类型描述） |
| ACT | Alliance for Competitive Telecommunications | 竞争性电信联盟 |
| ACT | Advanced Concepts Test | 高级概念测试 |
| ACT | Alliance for Coastal Technologies (NOAA funded partnership) | 沿海技术联盟（NOAA资助的伙伴关系） |
| ACT | Amarillo City Transit | 阿马里洛市交通 |
| ACT | Airborne Communications Technician | 机载通信技术员 |
| ACT | Additional Centre Tank | 附加中央油箱 |
| ACT | Allied Command Transformation | 盟军转型司令部 |
| ACT | Advertising Club of Toronto | 多伦多广告俱乐部 |
| ACT | American Conservatory Theater (Repertory Theatre Company In San Francisco, CA) | 美国音乐学院剧院（加利福尼亚州旧金山的剧目剧院公司） |
| ACT | Advanced Computer Techniques, Inc | 高级计算机技术公司 |
| ACT | Algebraic Compiler and Translator | 代数编译器和翻译器 |
| ACT | Advanced Computer Technology | 高级计算机技术 |
| ACT | Alternating Current Transformer | 交流变压器 |
| ACT | actinomycin | 放线菌素 |
| ACT | Activation | 激活 |
| ACT | Application Centric Terminal (IBM) | 以应用程序为中心的终端（IBM） |
| ACT | Ancestors | 祖先 |
| ACT | Alliance of Concerned Teachers (Philippines) | 关注教师联盟（菲律宾） |
| ACT | Accounting, Consulting & Training | 会计、咨询和培训 |
| ACT | Air Cargo Terminal | 航空货运站 |
| ACT | Alliance for Community Transformation (Lagos, Nigeria) | 社区转型联盟（尼日利亚拉各斯） |
| ACT | Automatic Custody Transfer | 自动托管转移 |
| ACT | Automated Coordinate Transfer | 自动坐标转换 |
| ACT | Actor | 男演员 |
| ACT | Advanced Composites Technology | 先进复合材料技术 |
| ACT | Activated Complex Theory | 活化络合物理论 |
| ACT | Advantage Coaching and Training | 优势辅导和培训 |
| ACT | Advanced Cordless Technologies (Europe) | 先进无绳技术（欧洲） |
| ACT | Arts & Culture Trust (South Africa) | 艺术和文化的信任(南非) |
| ACT | Activities, Contacts, Time (Symantec contact manager software) | 活动、联系人、时间（Symantec联系人管理器软件） |
| ACT | Adaptive Computing Technology | 自适应计算技术 |
| ACT | American Council for Technology | 美国技术委员会 |
| ACT | Arms Control Today (magazine) | 《今日军备控制》（杂志） |
| ACT | Access Control Technologies, Inc. | 访问控制技术公司。 |
| ACT | American College Test | 美国大学考试 |
| ACT | American College of Theriogenologists | 美国兽基因组学家学院 |
| ACT | Amazon Conservation Team | 亚马逊保护团队 |
| ACT | Assertive Community Treatment | 自信的社区治疗 |
| ACT | Accounting Division | 会计部 |