| OTT | Office of Transportation Technologies | 交通技术办公室 |
| OTT | One Time Text | 一次性文本 |
| OTT | One True Thing | 一件真实的事 |
| OTT | Object To Test | 要测试的对象 |
| OTT | Office of Transportation Technologies ( Department of Energy) | 运输技术办公室（能源部） |
| OTT | Ottumwa Terminal Railroad Company | 奥图姆瓦码头铁路公司 |
| OTT | Notingham VORTAC (VHF Omni-Range navigational station/TACAN station), Nottingham, Maryland USA | Notingham VORTAC(甚高频Omni-Range航行车站/ TACAN站)、诺丁汉,美国马里兰州 |
| OTT | Obelisk the Tormentor (Yu-Gi-Oh! card) | 方尖碑托恩特（Yu Gi Oh！卡片） |
| OTT | Over The Top | 夸张的 |
| OTT | Office of Technology Transfer | 技术转让办公室 |
| OTT | Office of Training Technology (Chief of Naval Operations) | 训练技术办公室（海军作战部长） |
| OTT | Off Their Trolley | 离开他们的手推车 |
| OTT | Optical Technology Training Ltd (UK) | 光学技术培训有限公司（英国） |
| OTT | Office of Technological Terminology (Technion, Israel) | 技术术语办公室（以色列Technion） |
| OTT | Office of Technology Transition (ODUSDS&T) | ODUSDS&T技术转移(办公室) |
| OTT | Our Toxic Times (newsletter of the Chemical Injury Information Network) | 我们的有毒时代（化学伤害信息网通讯） |
| OTT | Ottawa (Ontario, Canada) | 渥太华（加拿大安大略省） |
| OTT | Origin Truck Terminal | 始发卡车码头 |
| OTT | One-Time Tape | 一次性密带 |
| OTT | Office of Travel and Tourism | 旅游局 |
| OTT | Operational Training Test | 作战训练试验 |
| OTT | Operator Tactics Trainer | 操作人员战术训练器 |
| OTT | Ocean Tactical Targeting | 海洋战术目标 |
| OTT | Office of Transportation Technologies (US DOE) | 运输技术办公室（美国能源部） |
| OTT | Ontario Traffic Tickets (OTT Legal Services, Inc.; Canada) | 安大略省交通票据（OTT法律服务公司；加拿大） |
| OTT | Output Threshold Test | 输出阈值测试 |
| OTT | Off the Truck | 离开卡车 |
| OTT | Operating Theatre Technician (UK) | 操作剧院技术员（英国） |