| สมาคมคอมพิวเตอร์แห่งประเทศไทย | Academic & Science |
| Citizen Army Training | Academic & Science |
| Collaborative Active Textbooks | Academic & Science |
| Controlled Assessment Task | Academic & Science |
| Climate Action Tracker | Academic & Science |
| College Algebra/Trig | Academic & Science |
| Colegio Americano de Torreón | Academic & Science |
| Chamber of Architects of Turkey | Academic & Science |
| Cumulative Average Temperature | Academic & Science |
| Certified Accounting Technician | Accounts and Finance |
| Constant Amortized Time | Accounts and Finance |
| Cost, Access, and Terms | Accounts and Finance |
| Cat Island | Airport Code |
| Corporate Architecture Team | Business |
| Cut Away Tail | Business |
| Can Analyzing Tool | Business |
| Competitive Advantage of Turkey | Business |
| Certified Agile Tester | Business |
| Catco Reinsurance | Business |
| Customer Advisory Team | Business |
| Caterpillar, Incorporated | Business |
| Computer Association of Thailand | Business |
| Coverage Area Target | Business |
| Consultancy and Appropriate Technology | Business |
| Chimeric Acetyl Transferase | Chemistry |
| California Advocates of Trollopy | Community |
| Community Accessible Transport | Community |
| Citizens Area Transit | Community |
| Casual American Teenager | Community |
| Coolcat Active Training | Community |
| Community Arts Training | Community |
| Computer Assisted Teaching | Community |
| Computer Adaptive Test | Community |
| Classroom Assessment Technique | Community |
| Compensatory Acceleration Training | Community |
| Create A Trick | Community |
| Culture, Art, Technology | Community |
| California Achievement Test | Community |
| Canadian Achievement Test(s) | Community |
| Clubs of Alcoholics in Treatment | Community |
| Committee for Advanced Therapies | Community |
| Classic Arcade Trip | Community |
| Creative Art Techniques | Community |
| Critically Appraised Topic | Community |
| Community Access Television | Community |
| Creation And Translation | Community |
| Community Assistance Team | Community |
| Cat Action Team | Community |
| Community Action Team | Community |
| Chicago Area Theatre | Community |
| Community Adoption Team | Community |
| Cat Adoption Team | Community |
| Adoption Team | Community |
| Cellular Action Team (ECSP committee) | Computer and Networking |
| Concatenate | Computer Assembly Language |
| Computer Assisted Translation | Computing |
| Coding Analysis Toolkit | Computing |
| Centre for Alternative Technology | Computing |
| Computer Aided Technology | Computing |
| Catalog File | Computing |
| Capacity Analysis Tool | Computing |
| Common Authentication Technology | Computing |
| Central Alaska Time | Computing |
| Clock Access Time | Computing |
| Computer Aided Teaching | Computing |
| Conditional Access Table | Computing |
| Character Animation Technologies | Computing |
| Channel Association Tag | Computing |
| Continuous Asynchronous Transmission | Computing |
| Combined Attribute Table | Computing |
| Can Analyzer Tool | Computing |
| Collaborative Access Team | Computing |
| Computer And Technology | Computing |
| Command Authorization Table | Computing |
| Computer Aided Transcription | Computing |
| Computer Assisted Telephone | Computing |
| Computer Aided Technique | Computing |
| Character Assist Technology | Computing |
| Computer Aided Triage | Computing |
| Computer Aided Theatre | Computing |
| Computer Aided Tolerancing | Computing |
| Computer Aided Tomography | Computing |
| Computerized Adaptive Testing | Computing |
| Computational and Algorithmic Thinking | Computing |
| Cyber Action Team | Computing |
| Cybercrime Action Taskforce | Computing |
| Coupon Allocating Terminal | Computing |
| Cat Token | Cryptocurrency |
| CAT | Cryptocurrency |
| Capital Aggregator Token | Cryptocurrency |
| Certified Alarm Technician | Electronics |
| Catalog (cp Backup - Dbase Iv) | File Type |
| Quicken Intellicharge Categorization File | File Type |
| Rational Rose Logical Package | File Type |
| Canon Automatic Tuning | General |
| Catalytic | General |
| Clean Advanced Technology | General |
| Condensed Air Technology | General |
| Computerized Anti Theft System | General |
| Clean Air Taxi | General |
| Concept Active Tourer | General |
| China Automobile Trading | General |
| Charge Across Town | General |
| Carburetor Air Temperature | General |
| Clutch Alignment Tool | General |
| Cobra Automotive Technologies | General |
| Compact Active Tourer | General |
| California Automotive Teachers | General |
| Compressed Air Technology | General |
| Catalogue | General |
| California Association of Sunbeam Tiger | General |
| Customer Acceptance Test | General |
| Congestion Alleviation Transport | General |
| Collision Aversion Technology | General |
| Certificate in Automotive Technology | General |
| Compact All Terrain | General |
| Champion All Time | General |
| Cable and Telephone | General |
| Chatham Area Transit | General |
| Community Approved Tester | General |
| Certified Automotive Technician | General |
| City Airport Train | General |
| Charles Alexander Theodore | General |
| Cookie Action Team | General |
| Clever Anatomical Tricks | General |
| Christchurch Anime Tribe | General |
| Crap A Tack | General |
| Collect Any Trash | General |
| Cute Animal Thing | General |
| Child Abuse Team | Governmental |
| Community Activist Technology | Governmental |
| Committee Against Torture | Governmental |
| Clear-Air Turbulence | Governmental |
| Catamaran And Tri-hull | Governmental |
| Continually Always Towed | Governmental |
| Classical All Terrain | Governmental |
| Central Area Transit | Governmental |
| Civil Air Transport | Governmental |
| Charlottesville Area Transit | Governmental |
| Central Arkansas Transit | Governmental |
| Capital Area Transit | Governmental |
| Corrective Action Team | Governmental |
| Combat Auto Theft | Governmental |
| Confrontation Accusation And Threat | Governmental |
| Central Administrtive Tribunal | Governmental |
| Counter Assault Team | Governmental |
| Canadian Army Trophy | Governmental |
| Countermeasure Anti-Torpedo | Governmental |
| Computerized Axial Tomography | Healthcare |
| CHATTAR HAT | Indian Railway Station |
| Computer-Aided Translation | Information Technology |
| Comisaría de Abastecimientos y Transporte | International |
| Convention Against Torture | International |
| Can't Answer That | Internet |
| Complementary Angle Theorem | Maths |
| Common Admission Test | MBA Entrance Exam in India |
| Concentration Activated Transformation | Medical |
| Chloramphenicol Acetyl Transferase | Medical |
| Carnitine AcytlTransferase | Medical |
| Community Alcohol Team | Medical |
| Cardiac arrest team | Medical |
| Change Agent Team | Medical |
| Cataract | Medical |
| Coital Alignment Technique | Medical |
| Coblation Assisted Tonsillectomy | Medical |
| Cognitive Analytic Therapy | Medical |
| catalase | Medical |
| Center for Assistive Technology | Medical |
| Chlamydia antibody testing | Medical |
| chloramphenical acetyltransferase | Medical |
| Cambridge Antibody Technology | Medical |
| Capillary Agglutination Test | Medical |
| Card Agglutination Test | Medical |
| Capacity Action Team | Medical |
| COPD Assessment Test | Medical |
| Cognitive Abilities Test | Medical |
| Category | Military and Defence |
| Combat Application Tourniquet | Military and Defence |
| Continuous Adaptive Terrain | Military and Defence |
| Crisis Action Team | Military and Defence |
| Computer-assisted Training | Military and Defence |
| Center for Army Tactics | Military and Defence |
| Capital Asset Tracking | Military and Defence |
| Computed Axial Tomography | Physics Related |
| Competition Appeal Tribunal | Regional |
| Computer-aided Testing | Softwares |
| Charges, Access, and Terms | Telecommunication |
| Central African Time | Time |
| Central Alaska Time [utc - 1000] | Time |
