| CATT | calcium tolerance test | 钙耐量试验 |
| CATT | Cooled Anode Transmitting Tube | 屏极冷却式发射管 |
| CATT | Ceramic Audio Tone Transducer | 陶瓷音频声调转换器 |
| CATT | Contractors Association of Truckee Tahoe (California) | Truckee Tahoe承包商协会（加利福尼亚州） |
| CATT | Card Agglutination Test for Trypanosomiasis | 锥虫病卡片凝集试验 |
| CATT | Computer Assisted Technology Transfer | 计算机辅助技术转让 |
| CATT | Campaign Against Tiger Trafficking | 打击贩卖老虎运动 |
| CATT | Combined Arms Tactical Trainer | 联合兵种战术训练器 |
| CATT | Controlled Avalanche Transit Time | 可控制的崩落通过时间 |
| CATT | Companion Animal Touch & Therapies (Beach Park, Illinois) | 99小小动物接触和治疗(海滩公园,伊利诺斯州) |
| CATT | Center for Advanced Technology in Telecommunications | 电信先进技术中心 |
| CATT | Computerized Axial Transverse Tomography (medical imaging technique; now Computed Tomography) | 计算机轴向断层扫描（医学成像技术；现为计算机断层扫描） |
| CATT | Chinese Academy of Telecommunications Technology (Beijing, China) | 中国电信技术研究院（中国北京） |
| CATT | Computer-Automated Transportation Tool | 计算机自动运输工具 |
| CATT | Complications of Age-Related Macular Degeneration Treatment Trials (trial of Avastin vs Lucentis) | 年龄相关性黄斑变性治疗试验的并发症（Avastin vs Lucentis试验） |
| CATT | Center for Advanced Transportation Technologies | 先进运输技术中心 |
| CATT | Computer-Aided Test Tool | 计算机辅助测试工具 |
| CATT | Catapult Communications Corporation | Catapult通信公司 |
| CATT | calcium tolerance test | 钙耐受试验 |
| CATT | Computer Aided Test Tool | 计算机辅助测试工具 |
| CATT | Combined Arms Tactical Trainers | 联合兵种战术教练 |
| CATT | China Academy of Telecommunication Technology | 中国电信技术研究院 |
| CATT | Clinical Assessment, Tracking, and Triage | 临床评估、跟踪和分类 |
| CATT | Chemicals Agitation Temperature And Time | 化学品搅拌温度和时间 |
| CATT | Computer And Technology Theme | 计算机与技术主题 |