| CTA | County Tourism Administration | 县旅游局 |
| CTA | Cable Television Association | （英国）电缆电视协会 |
| CTA | Cellulose triacetate | 三醋酸纤维素 |
| CTA | Critical To Assembly | 重要裝配尺寸 |
| CTA | Cordless Terminal Adaptor | 无绳终端适配器 |
| CTA | Consolidated Tape Association | 整合磁带协会 |
| CTA | Catamount Trail Association (Burlington, VT) | Catamount Trail协会（佛蒙特州伯灵顿） |
| CTA | CDS (Combat Direction System) Track Association | 作战指挥系统航迹协会 |
| CTA | Chinese Taoist Association | 中国道教协会 |
| CTA | California Teachers Association | 加州教师协会 |
| CTA | Colorado Translators Association | 科罗拉多州翻译协会 |
| CTA | Commercial Travelers Association | 商业旅行者协会 |
| CTA | Community Transport Association (UK) | 社区交通协会（英国） |
| CTA | Cable Telecommunications Association | 有线电信协会 |
| CTA | Computer Technology Associates | 计算机技术协会 |
| CTA | California Trucking Association | 加州卡车运输协会 |
| CTA | Community Tennis Association | 社区网球协会 |
| CTA | Catania, Sicily, Italy - Fontanarossa (Airport Code) | 意大利西西里岛卡塔尼亚-丰塔纳罗萨（机场代码） |
| CTA | Classroom Teachers Association | 课堂教师协会 |
| CTA | California Telephone Association | 加利福尼亚电话协会 |
| CTA | Canadian Telework Association | 加拿大电信协会 |
| CTA | Counterintelligence Training Academy | 反情报训练学院 |
| CTA | Completely Terrible Analysis | 完全可怕的分析 |
| CTA | Consumer Telecommunications Agreement (Sprint) | 消费者电信协议（Sprint） |
| CTA | Cooperative Test Agreement | 合作测试协议 |
| CTA | Cuenta (Spanish: account) | Cuenta（西班牙语：账户） |
| CTA | Common Table of Allowance | 通用津贴表 |
| CTA | Commercial Transport Act (Canada) | 《商业运输法》（加拿大） |
| CTA | Certified Track-It! Administrator | 认证追踪！管理员 |
| CTA | Capitalization of Tangible Assets | 有形资产资本化 |
| CTA | Counter Trafficking Activities | 打击贩运活动 |
| CTA | Cisco Trust Agent | 思科信托代理 |
| CTA | Cognizant Transportation Agency | 公认的运输机构 |
| CTA | Center for Transportation Analysis | 运输分析中心 |
| CTA | Community Technology Alliance | 社区技术联盟 |
| CTA | Critical Thinking Appraisal | 批判性思维评估 |
| CTA | Cum Testamento Annexo (Latin: With the Will Attached) | Cum Testamento Annex（拉丁语：附遗嘱） |
| CTA | Chartered Tax Adviser | 特许税务顾问 |
| CTA | Clinical Trial Authorization | 临床试验授权 |
| CTA | (USN Rating) Cryptologic Technician (Administrative) | （USN评级）加密技术员（管理） |
| CTA | Child Trauma Academy | 儿童创伤学院 |
| CTA | Clear to auscultation | 听诊清楚 |
| CTA | Chemical Target Analysis | 化学目标分析 |
| CTA | Computerized Telephone Accounting | 计算机电话计费 |
| CTA | Center Trust, Inc. | 中心信托公司。 |
| CTA | Center for Total Access (Fort Gordon, GA) | 全面访问中心（乔治亚州戈登堡） |
| CTA | Critical Threat Analysis | 关键威胁分析 |
| CTA | Chief Test Administrator | 首席测试管理员 |
| CTA | Croatian Telecommunications Agency | 克罗地亚电信局 |
| CTA | Call To Action | 行动号召 |
| CTA | Contractor Team Arrangement | 承包商团队安排 |
| CTA | Center Frequency Tone | 中心频率音调 |
| CTA | Central Terminal Area (LaGuardia Airport) | 中央航站区（拉瓜迪亚机场） |
| CTA | Conservation Technical Assistance | 保护技术援助 |
| CTA | Critical Task Analysis | 关键任务分析 |
| CTA | Cycleworld Thugs of America | 美国自行车世界打手 |
| CTA | Canadian Transportation Agency | 加拿大交通局 |
| CTA | Clinical Trial Assay | 临床试验分析 |
| CTA | Commercial Test Agreement | 商业测试协议 |
| CTA | Control Area (Air Traffic) | 控制区（空中交通） |
| CTA | Catania, Italy | 意大利卡塔尼亚 |
| CTA | Central TMDE ( Test, Measurement, and Diagnostic Equipment) Activity | 中央TMDE（测试、测量和诊断设备）活动 |
| CTA | Cryptologic Technician Administrative (US Navy) | 密码技术管理员（美国海军） |
| CTA | Cognitive Task Analysis | 认知任务分析 |
| CTA | Clinical Trial Authorisation (UK) | 临床试验授权（英国） |
| CTA | Credibility Through Accountability | 通过责任实现信誉 |
| CTA | Currency Translation Adjustment | 货币换算调整 |
| CTA | Clinical Trials Agreement | 临床试验协议 |
| CTA | Coast Transit Authority | 海岸运输局 |
| CTA | Computed Tomography Angiography (medical imaging) | 计算机断层摄影血管造影（医学成像） |
| CTA | Customer Test Assist | 客户测试协助 |
| CTA | Cumulative Translation Adjustment (accounting) | 累计折算调整（会计） |
| CTA | Call to Arms (gaming, Lord of Destruction Runeword) | 武器召唤（游戏，毁灭之王Runword） |
| CTA | Cabletron Traffic Accountant | Cabletron交通会计师 |
| CTA | Clear To Auscultation (medical; lungs) | 听诊清晰（医学；肺部） |
| CTA | Controlled Thrust Assembly (NASA) | 受控推力组件（NASA） |
| CTA | Classified Terminal Area | 分类航站区 |
| CTA | Centre Technique de CoopÉration Agricole et Rurale (French) | Centre Technique de CoopÉration Agricole et Rurale (French) |
| CTA | Curriculum Training Associates (Company) | 课程培训助理（公司） |
| CTA | Cadet Training Assistant (Air Force ROTC) | 学员训练助理（空军后备军官训练队） |
| CTA | Cleveland Thygaraja Aradhana | 克利夫兰Thygaraja Aradhana |
| CTA | Cotton-Tipped Applicators | 棉质尖头治疗头 |
| CTA | Chicago Transit Authority | 芝加哥交通管理局 |
| CTA | Controlled Time of Arrival | 受控到达时间 |
| CTA | Chief Technical Adviser | 首席技术顾问 |
| CTA | Children of The Americas | 美洲儿童 |
| CTA | Channel & Traffic Control Agency | 通道和交通控制机构 |
| CTA | Controlled Thrust Assembly | 受控推力组件 |
| CTA | Call to Arms (Diablo 2 gaming) | 武器召唤（暗黑破坏神2游戏） |
| CTA | Cellulose Triacetate (membrane used for reverse osmosis) | 三乙酸纤维素（反渗透膜） |
| CTA | Circuit Timing Analysis | 电路时序分析 |
| CTA | Certified Travel Associate | 注册旅行助理 |
| CTA | Computational Technology Area | 计算技术领域 |
| CTA | Clearing The Air (workshops) | 净化空气（车间） |
| CTA | Cover Thy Ass | 盖上你的屁股 |
| CTA | Centro TÉcnico Aerospacial (Airspace Technical Center - São JosÉ dos Campos, Brazil) | Centro TÉcnico Aerospacial (Airspace Technical Center - São JosÉ dos Campos, Brazil) |
| CTA | Consolidated Table of Allowance | 综合津贴表 |
| CTA | Common Terms Agreement | 通用条款协议 |
| CTA | Customer To Advise | 客户建议 |