| PTT | protein truncation test | 错配接合蛋白质截短测试法 |
| PTT | Public Telephone and Telegraph | 公共电话电报，类似于PSTN。 |
| PTT | Postal, Telegraph and Telephone | 邮政，电报和电话 |
| PTT | Professional Trainer Training | 职业培训师的培训 |
| PTT | Push To Talk | 单键讲话 |
| PTT | Project Tracking Tool | 项目跟踪工具 |
| PTT | Professional Technical Trainer | 专业技术培训师 |
| PTT | Property Transfer Tax | 财产转让税 |
| PTT | Platform Transmitter Terminal | 平台变送器终端 |
| PTT | Postal Telegraph and Telephone | 邮政电报和电话 |
| PTT | Public Telephone & Telegraph | 公用电话和电报 |
| PTT | Post Telephone and Telegraph | 邮政电话和电报 |
| PTT | Physical Training Test | 体能训练测试 |
| PTT | Petroleum Authority of Thailand (Bangkok, Thailand) | 泰国石油管理局（泰国曼谷） |
| PTT | Providers of Telecommunications Training | 电信培训提供商 |
| PTT | Pittsburg Tank & Tower Company Inc. | 美国坦克和塔公司 |
| PTT | Personnel Transition Team | 人员过渡团队 |
| PTT | Poste, TÉlÉphone et TÉlÉcommunications (French Post Office) | Poste, TÉlÉphone et TÉlÉcommunications (French Post Office) |
| PTT | Plotting Team Trainer | 绘图团队培训师 |
| PTT | Part Task Trainer | 兼职教练员 |
| PTT | posterior tibial transfer | 胫骨后移植物 |
| PTT | protein tolerance test | 蛋白质耐受试验 |
| PTT | Postal, Telephone, and Telegraph | 邮政、电话和电报 |
| PTT | Postal Telegraph Telephone | 邮政电报电话 |
| PTT | Postal, Telephone and Telegraph Authority | 邮政、电话和电报局 |
| PTT | Poste, TÉlÉcommunications et TÉlÉdiffusion | Poste, TÉlÉcommunications et TÉlÉdiffusion |
| PTT | Presentations That Talk | 演讲 |
| PTT | Permission To Talk to.... | 与…交谈的权限。。。。 |
| PTT | Press To Talk | 按键通话 |
| PTT | Post, Telephone, and Telegraph | 邮政、电话和电报 |
| PTT | Professional Technology Temple (Taiwan BBS) | 专业技术圣殿（台湾BBS） |
| PTT | Pijama Terlik Televizyon (Turkish) | Pijama Terlik Televizyon（土耳其语） |
| PTT | Partial Thromboplastin Time (test) | 部分凝血活酶时间（试验） |
| PTT | Posterior Tibial Tendon | 胫骨后肌腱 |
| PTT | permit to transfer (shipping) | 运输许可证 |
| PTT | Program Technical Training | 项目技术培训 |
| PTT | Push-To-Talk (radio tranceivers) | 按键通话（无线电收发器） |
| PTT | Partial Thromboplastin Time | 部分凝血活酶时间 |
| PTT | Protocol Test Tool | 协议测试工具 |
| PTT | patellar tendon transfer | 髌腱转移 |
| PTT | Police Transition Team | 警察过渡队 |
| PTT | Programming Tools and Techniques | 编程工具和技术 |
| PTT | Poly(Trimethylene Terephthalate) (chemical thermoplastic polymer) | 聚对苯二甲酸三甲酯（化学热塑性聚合物） |
| PTT | Posta Telgraf Ve Telefon (Turkey) | Posta Telgraf Ve Telefon（土耳其） |
| PTT | Push-To-Test | 推送测试 |
| PTT | Ministry of Post, Telegraph and Telephone (Iran) | 邮政、电报和电话部（伊朗） |
| PTT | Presidential Technology Team | 总统技术团队 |
| PTT | pulmonary transit time | 肺传输时间 |
| PTT | pulse transmission time | 脉冲传输时间 |