| Acronym | Definition |
|---|
| CTA | Chicago Transit Authority |
| CTA | CDS (Combat Direction System) Track Association |
| CTA | Cuenta (Spanish: account) |
| CTA | California Teachers Association |
| CTA | Canadian Transportation Agency |
| CTA | Call to Action (Catholic lay organization) |
| CTA | Commodity Trading Advisor |
| CTA | Computed Tomography Angiography (medical imaging) |
| CTA | Central Tibetan Administration |
| CTA | Centre Technique de Coopération Agricole et Rurale (French) |
| CTA | Central de los Trabajadores Argentinos (Confederation of Argentine Workers) |
| CTA | Consolidated Tape Association |
| CTA | Cisco Trust Agent |
| CTA | Cognitive Task Analysis |
| CTA | Control Area (Air Traffic) |
| CTA | Center for Technology Assessment |
| CTA | California Trucking Association |
| CTA | Community Transport Association (UK) |
| CTA | Call to Arms (Diablo 2 gaming) |
| CTA | Call to Arms (gaming, Lord of Destruction Runeword) |
| CTA | Cellulose Triacetate (membrane used for reverse osmosis) |
| CTA | Certified Travel Associate |
| CTA | Center for Transportation Analysis |
| CTA | Conservation Technical Assistance |
| CTA | International Center for Technology Assessment |
| CTA | Canadian Telework Association |
| CTA | Community Tennis Association |
| CTA | Computer Technology Associates |
| CTA | Clinical Trial Authorisation (UK) |
| CTA | Central Terminal Area (LaGuardia Airport) |
| CTA | Classroom Teachers Association |
| CTA | Cumulative Translation Adjustment (accounting) |
| CTA | Clinical Trials Agreement |
| CTA | Colorado Translators Association |
| CTA | Coast Transit Authority |
| CTA | Centro Técnico Aerospacial (Airspace Technical Center - São José dos Campos, Brazil) |
| CTA | Controlled Time of Arrival |
| CTA | Children's Television Act of 1990 |
| CTA | Community Technology Alliance |
| CTA | Clearing The Air (workshops) |
| CTA | Critical Thinking Appraisal |
| CTA | Catamount Trail Association (Burlington, VT) |
| CTA | California Telephone Association |
| CTA | Collaborative Technology Alliances (military robotic research) |
| CTA | Currency Translation Adjustment |
| CTA | Clear To Auscultation (medical; lungs) |
| CTA | Cable Telecommunications Association |
| CTA | Classification Tree Analysis |
| CTA | Central Training Academy (security training institution) |
| CTA | Common Table of Allowance |
| CTA | Corrections Technology Association |
| CTA | Colorado Telecommunications Association |
| CTA | Computational Technology Area |
| CTA | Contractor Team Arrangement |
| CTA | Common Terms Agreement |
| CTA | Catania, Sicily, Italy - Fontanarossa (Airport Code) |
| CTA | Controllore del Traffico Aereo (Italian: air traffic controller) |
| CTA | Child Trauma Academy |
| CTA | Clinical Trial Assay |
| CTA | Cum Testamento Annexo (Latin: With the Will Attached) |
| CTA | Canadian Theatre Agreement |
| CTA | Cryptologic Technician Administrative (US Navy) |
| CTA | Croatian Telecommunications Agency |
| CTA | Chimie Théorique Appliquée |
| CTA | Competitive Telecommunications Association |
| CTA | Cadet Training Assistant (Air Force ROTC) |
| CTA | Canadian Trotting Association |
| CTA | Critical Task Analysis |
| CTA | Certified Tax Accountant (certification) |
| CTA | Center for Total Access (Fort Gordon, GA) |
| CTA | Cotton-Tipped Applicators |
| CTA | China Type Approval |
| CTA | Centre de Technologie Avancée (French: Advanced Technology Center) |
| CTA | Certified Tax Administrator |
| CTA | Chief Technical Architect (job title) |
| CTA | Chinese Taoist Association |
| CTA | Clinical Telephone Advice (UK) |
| CTA | Cabletron Traffic Accountant |
| CTA | Commercial Transport Act (Canada) |
| CTA | Controlled Thrust Assembly (NASA) |
| CTA | California Transportation Authority |
| CTA | Central TMDE Activity |
| CTA | Compassionate Travel Assistance (Canada) |
| CTA | Commercial Test Agreement |
| CTA | Customer To Advise |
| CTA | Cover Thy Ass |
| CTA | Commercial Travelers Association |
| CTA | Circuit Timing Analysis |
| CTA | Competitive Telecommunications Alliance |
| CTA | Center Test Authority |
| CTA | Capitalization of Tangible Assets |
| CTA | Certified Track-It! Administrator |
| CTA | Companion Trainer Aircraft |
| CTA | Credibility Through Accountability |
| CTA | Capital Theory Approach |
| CTA | Country Team Assessment (US Foreign Military Sales) |
| CTA | Common Tactical Aircraft |
| CTA | Certification of Territorial Authority (Indiana PSC) |
| CTA | Coating Technologies Associates |
| CTA | Center Frequency Tone |
| CTA | Cooperative Test Agreement |
| CTA | (USN Rating) Cryptologic Technician (Administrative) |
| CTA | Consolidated Table of Allowance |
| CTA | Customer Test Assist |
| CTA | Critical Threat Analysis |
| CTA | Classified Terminal Area |
| CTA | Counterintelligence Training Academy |
| CTA | Counter Trafficking Activities |
| CTA | Chemical Target Analysis |
| CTA | Cycleworld Thugs of America |
| CTA | Channel & Traffic Control Agency |
| CTA | Consumer Telecommunications Agreement (Sprint) |
| CTA | Computerized Telephone Accounting |
| CTA | Contract Technical Administrator |
| CTA | Cognizant Transportation Agency |
| CTA | Children's Transplant Association |
| CTA | Chief Test Administrator |
| CTA | Cleveland Thygaraja Aradhana |