| Acronym | Definition |
|---|
| CTI | Computer Telephony Integration |
| CTI | Computer Technology Institute |
| CTI | Comparative Tracking Index |
| CTI | Coaches Training Institute (San Rafael, CA) |
| CTI | Coral Triangle Initiative |
| CTI | Craft Terminal Interface |
| CTI | Computer Telephony Interface |
| CTI | Climate Technology Initiative |
| CTI | Cooling Tower Institute |
| CTI | Christianity Today International |
| CTI | Computers in Teaching Initiative (UK) |
| CTI | Cooling Technology Institute |
| CTI | Computer Science, Telecommunications and Information Systems |
| CTI | Customer Type Indicator |
| CTI | Cuerpo Tecnico de Investigaciones (Spanish: Technical Investigations Corps; Colombia) |
| CTI | Castings Technology International (UK) |
| CTI | Central Tire Inflation (tires) |
| CTI | Central Tire Inflation |
| CTI | Computerized Thermal Imaging |
| CTI | Competitive Technical Intelligence |
| CTI | Cornet Technology, Inc. |
| CTI | Critical Therapeutics Inc |
| CTI | Confederation of Tanzania Industries |
| CTI | Cryptologic Technician (Interpreter) |
| CTI | Charge Transfer Inefficiency |
| CTI | Current Time Indicator (video editing software) |
| CTI | Canadian Trade Index |
| CTI | Cryptologic Technician Interpretive |
| CTI | Clinical Tobacco Intervention (Canada) |
| CTI | Critical Technologies Institute |
| CTI | Connecticut Transportation Institute (University of Connecticut) |
| CTI | Concrete Technology Incorporated |
| CTI | Cable Tray Institute |
| CTI | ConferTech International |
| CTI | Competitive Technology Intelligence |
| CTI | College Training Initiative (Air Traffic Control) |
| CTI | Container Transport International |
| CTI | Carrier Telephone Industries (Pakistan) |
| CTI | Combined Taxable Income |
| CTI | Compatible Technology International (Saint Paul, MN) |
| CTI | Commerce Technologies, Inc |
| CTI | Category, Type, Item (classification method) |
| CTI | Cooperação Técnica Internacional (Brasil) |
| CTI | Clinical Trials, Inc |
| CTI | Color Transition Improvement (video processing) |
| CTI | Comprehensive Technologies International, Inc. |
| CTI | Coaxial Transceiver Interface |
| CTI | Circulatory Technology Inc. |
| CTI | Computational Testbed for Industry |
| CTI | Castle Transmission International LTD |
| CTI | Cardinal Tracking, Inc. |
| CTI | Cycle Time Improvement |
| CTI | Coherent Torodial Interconnect |
| CTI | Computer Telephone Integrator |
| CTI | Ceramic Tile Installer |
| CTI | Critical Transportation Item (NASA) |
| CTI | Centralized Ticket Investigation |
| CTI | Complaint Type Investigation |
| CTI | Critical Technical Issues |
| CTI | Coherence Time Interval |
| CTI | Customs Training Institute (Japan) |
| CTI | Construction Testing and Inspections (Consultants, Inc; Richmond, VA) |
| CTI | Cincinnati Transplant Institute, Inc (Cincinnati, OH) |
| CTI | Central Toll Investigation |
| CTI | Commercial Technology Insertion (technology refreshment systems engineering) |
| CTI | Centralized Training Institute (Chicago Metropolitan Battered Women's Network; Illinois) |
| CTI | Color Texture Interpolator Chip |
| CTI | Combat Tactical Intelligence |
| CTI | Command Technical Inspection |
| CTI | Confederation of Trade and Industry |
| CTI | Contract Technical Instructor |
| CTI | Command Technology Issue |
| CTI | (USN Rating) Cryptologic Technician (Interpretive) |
| CTI | Consultant Technical Instruction |
| CTI | Command and Telemetry Interface |
| CTI | California Transportation Plan |
| CTI | California Technological Institute (aka CalTech) |
| CTI | Contribution from Taxable Income (student financial aid) |
| CTI | Commerce Technology International |
| CTI | Cross Technologies, Inc. (Solebury, Pennsylvania) |
| CTI | Connect Tech, Inc. (various locations) |
| CTI | Couplage Téléphonie-Informatique (French: Computer-Telephony Integration) |
| CTI | Competitive Technologies, Inc. (Fairfield, CT) |
| CTI | Certified Termite Inspections (Sacramento, CA) |
| CTI | Centres Techniques Industriels (French: Industrial Technical Center) |
| CTI | Centre de Techniques Internationales (French: International Technical Center) |
| CTI | Contrôle Technique Immobilier (French real estate company) |
| CTI | Céramiques Techniques Industrielles (French ceramics company) |
| CTI | Conseils Transports Industriels (French: Industrial Transportation Advice) |
| CTI | Counter-Terrorism Intelligence |
| CTI | Connexion Téléphone Informatique (French: Computer Telephone Connection) |
| CTI | Centre de Traitement de l'Information (French: Information Processing Center) |
| CTI | Coal Trader International (McGraw-Hill publication) |