| OTN | Optical Transmission Net | 光传送网 |
| OTN | Oaktown, Indiana (Airport Code) | 印第安纳州奥克敦（机场代码） |
| OTN | Open Transport Network | 开放传输网络 |
| OTN | Own the Night | 一夜拥有 |
| OTN | Oaktown, Indiana USA | 美国印第安纳州奥克镇 |
| OTN | Ontario Tobacco- Free Network | 安大略省烟草免费网络 |
| OTN | Over TheNet | 通过网络 |
| OTN | Out There News | 外面的新闻 |
| OTN | Operational Teletype Network | 作战电传网 |
| OTN | Optical Transport Network (Cienna) | 光传输网络（Cienna） |
| OTN | Optical Terminal Node | 光终端节点 |
| OTN | Order Tracking Number | 订单跟踪编号 |
| OTN | Otdeleniye Technicheskikh Nauk (Russian: Section for Technical Scientific Works) | Otdeleniye Technicheskikh Nauk（俄语：技术科学工作科） |
| OTN | Oregon Transportation Network | 俄勒冈州交通网络 |
| OTN | Open Transport Network (Apple) | 开放传输网络（Apple） |
| OTN | Own-The-Night (military technology) | 拥有夜晚（军事技术） |
| OTN | On the Needles (used by knitters to describe current projects) | 织针（编织者用来描述当前项目） |
| OTN | Oracle Technology Network | 技术网络 |
| OTN | Online Training Network | 在线培训网络 |
| OTN | On The Net | 在网络上 |
| OTN | Operating Theater Nurse | 手术室护士 |
| OTN | Oncology Therapeutics Network | 肿瘤治疗网络 |
| OTN | On That Note | 在那张纸条上 |
| OTN | Oklahoma Telemedicine Network | 俄克拉荷马州远程医疗网络 |
| OTN | Observer Team to Nigeria (Canadian military) | 尼日利亚观察员小组（加拿大军方） |