| TAO | Track At Once | 轨道刻录 |
| TAO | Telecommunications Advancement Organization of Japan | 日本电信进步组织 |
| TAO | Transformation Alignment Office (Canada) | 转型协调办公室（加拿大） |
| TAO | thromboangiitis obliterans | 血栓闭塞性脉管炎 |
| TAO | Terrain Avoidance Override | 地形回避超越 |
| TAO | TraducciÓn Asistida por Ordenador (Spanish: Computer-Assisted Translation) | TraducciÓn Asistida por Ordenador (Spanish: Computer-Assisted Translation) |
| TAO | Tropical Atmosphere Ocean | 热带大气海洋 |
| TAO | Travel Agents Ordinance | 旅行代理商条例 |
| TAO | Taxpayer Assistance Order | 纳税人援助令 |
| TAO | Tin-Antimony Oxide | 锡锑氧化物 |
| TAO | TOGA Automated Observations | TOGA自动观测 |
| TAO | Technical Assistance Operations | 技术援助运营 |
| TAO | Test Analysis Outline | 测试分析大纲 |
| TAO | Technical Applications Office | 技术应用办公室 |
| TAO | TOGA Atmosphere Ocean | TOGA大气海洋 |
| TAO | TACAN Only | 仅TACAN |
| TAO | Traduction AssistÉe Par Ordinateur (French: computer-assisted translation) | Traduction AssistÉe Par Ordinateur (French: computer-assisted translation) |
| TAO | Tokyo Astronomical Observatory | 东京天文台 |
| TAO | Toolkit for Advanced Optimization | 高级优化工具包 |
| TAO | triacetyloleandomycin | 三乙酰齐墩霉素 |
| TAO | Totally Automated Office | 全自动化办公室 |
| TAO | The ACE ORB (Object Computing, Inc.) | ACE ORB（对象计算公司） |
| TAO | Transition Assistance Office | 过渡援助办公室 |
| TAO | Tactical Air Observer/Observation | 战术飞行观察者/观察 |
| TAO | The American Organist | 美国生物 |
| TAO | Tactical Aeronautical Order | 战术航空指令 |
| TAO | Tactical Action Officer | 战术行动官 |
| TAO | Tactically Augmented Organism | 战术增强生物体 |
| TAO | Fleet Oiler - MSC Manned (also abbreviated T-AO) | 舰队加油机-MSC载人（也称为T-AO） |
| TAO | Technology Application And Organization | 技术应用与组织 |
| TAO | Track-At-Once (CD creation) | 立即跟踪（CD创建） |
| TAO | Teen Advice Online | 青少年在线建议 |
| TAO | The Ace Orb | 王牌球 |
| TAO | The Anarchist Organization | 无政府主义组织 |
| TAO | Testability Analysis And Optimization | 可测试性分析和优化 |
| TAO | Truth Above Oneself | 真理高于自我 |
| TAO | Qingdao, Mainland China | 中国大陆青岛 |
| TAO | Topics Associations And Occurrences | 主题关联和事件 |
| TAO | The Autumn Offering (band) | 秋祭（乐队） |
| TAO | Total Advanced Optimization | 总体高级优化 |
| TAO | The Alphabetical Order (Washington, DC rock band) | 字母顺序（华盛顿DC摇滚乐队） |
| TAO | Transfer of Authority | 权力的转移 |
| TAO | Technical Arrest Order | 技术逮捕令 |
| TAO | Tactical Air Operations | 战术空中作战 |
| TAO | Tactical Actions Officer | 战术行动官 |
| TAO | Transportation Applications Office | 交通应用办公室 |
| TAO | Time and Altitude Over ... (location) | 时间和高度超过…（位置） |
| TAO | Tactical Air/Action Officer | 战术飞行/行动军官 |
| TAO | Task Area Objective | 任务领域目标 |
| TAO | Technical Assistance Order | 技术援助订单 |
| TAO | Telephony Application Object (CORBA) | 电话应用程序对象（CORBA） |
| TAO | Technology Applications Office | 技术应用办公室 |
| TAO | Ten Acre Observatory (Oklahoma) | 十英亩天文台（俄克拉何马州） |
| TAO | TSCA Assistance Office (US EPA) | TSCA援助办公室（美国EPA） |
| TAO | Tactical Area of Operations | 战术作战区 |
| TAO | Temporary Area Office | 临时区域办公室 |
| TAO | Triple Antibiotic Ointment | 三联抗生素软膏 |