| CHAT | Confident Happy Adolescents Talking | 自信快乐的青少年交谈 |
| CHAT | Chattahoochee River National Recreation Area (US National Park Service) | 查塔霍切河国家娱乐区（美国国家公园管理局） |
| CHAT | Choline Acetyltransferase | 胆碱乙酰转移酶 |
| CHAT | Chemically Hardened Air Transportable Hospital | 化学硬化空运医院 |
| CHAT | Chicago Harmony And Truth | 芝加哥和谐与真理 |
| CHAT | Community Hospitality And Talk | 社区接待和谈话 |
| CHAT | Christmas Harms A Tree | 圣诞伤害一棵树 |
| CHAT | continuous heat aerosol therapy | 持续热气溶胶疗法 |
| CHAT | Craft, Health, Activities, and Timeout | 工艺、健康、活动和超时 |
| CHAT | choline acetyl transferase | 胆碱乙酰转移酶 |
| CHAT | Conversational Hypertext Access Technology (Communications Canada) | 会话超文本访问技术（加拿大通信部） |
| CHAT | Checklist for Autism in Toddlers | 幼儿自闭症检查表 |
| CHAT | Criminal History Access Tool (state of Michigan) | 犯罪历史访问工具（密歇根州） |
| CHAT | Chemicals, Heat, Agitation, Time (soil suspension cleaning) | 化学品、热量、搅拌、时间（土壤悬浮液清洁） |
| CHAT | Cat Horse And Tree | 猫马和树 |
| CHAT | Community Hebrew Academy of Toronto | 多伦多希伯来社区学院 |
| CHAT | Computerized Home Aphasia Therapy | 计算机家庭失语症治疗 |
| CHAT | Citizens for Humane Animal Treatment | 人道动物待遇公民 |
| CHAT | Commercial Helicopter Advisory Team | 商用直升机咨询团队 |
| CHAT | Children Happy About Themselves | 孩子们自我快乐 |
| CHAT | Completing Homework Assignments Today | 今天完成作业 |
| CHAT | Confidentially Helping All Teens | 秘密帮助所有青少年 |