| TOS | Terms of Service | 服务条款 |
| TOS | Type of Service | 服务类型 |
| TOS | Tape Operating System | 磁带操作系统 |
| TOS | Transfer Orbit Stage | 转移轨道级 |
| TOS | Tiros Operational Satellite | 泰罗斯工作卫星 |
| TOS | Tromso, Norway - Tromso/Langes (Airport Code) | Tromso、挪威- Tromso / Langes(机场代码) |
| TOS | Tip of the Spear | 矛尖 |
| TOS | thoracic outlet syndrome | 胸廓出口综合征 |
| TOS | Trusted Operating System | 受信任的操作系统 |
| TOS | Temporarily Out of Stock | 暂时缺货 |
| TOS | Temporarily Out of Service | 暂停服务 |
| TOS | Tactical Operations System | 战术作战系统 |
| TOS | The Oceanography Society | 海洋学会 |
| TOS | Tactical Oceanographic Summary | 战术海洋学概要 |
| TOS | Top of the Stack | 堆栈顶部 |
| TOS | Teacher Over Shoulder (chat) | 肩上老师（聊天） |
| TOS | Tape Operating System (IBM) | 磁带操作系统（IBM） |
| TOS | Temple of Set | 集合神殿 |
| TOS | Tramiel Operating System (Atari ST/TT operating system) | Tramiel操作系统(还是打吃ST / TT操作系统) |
| TOS | Terminal Operation System | 终端操作系统 |
| TOS | Tennessee Orthopaedic Society | 田纳西州骨科学会 |
| TOS | Taken Out and Shot | 取出并射击 |
| TOS | Top Of Stack | 堆栈顶部 |
| TOS | TIROS Operational System | TIROS操作系统 |
| TOS | Testing Operation System | 测试操作系统 |
| TOS | The Outdoor School | 户外学校 |
| TOS | Taken On Strength | 承受的强度 |
| TOS | time of service | 服务时间 |
| TOS | toxic-oil syndrome | 毒油综合征 |
| TOS | Tromso, Norway | 挪威特罗姆瑟 |
| TOS | tricuspid opening snap | 三尖瓣开口折断 |
| TOS | Atari S T Self-extracting file archive file | Atari S T自解压文件存档文件 |
| TOS | tension of oculus sinister | 左眼张力 |
| TOS | Teraflop Operating System | Teraflop操作系统 |
| TOS | Star Trek, The Original Series | 星际旅行，原创系列 |
| TOS | Tasteless, Offensive Stupidity | 无味，令人厌恶的愚蠢 |
| TOS | The Original Series | 原始系列 |
| TOS | ToasterOS (Operating System) | ToasterOS（操作系统） |
| TOS | Transmission Optimization System | 变速箱优化系统 |
| TOS | Top of Shelf | 货架顶部 |
| TOS | Top of Steel | 钢的顶部 |
| TOS | Tales of Suspense (comic) | 悬疑故事（漫画） |
| TOS | Track on Search | 搜索时跟踪 |
| TOS | TIOS (Television Infrared Orbital Satellite) Operational System | 电视红外轨道卫星操作系统 |
| TOS | Turbine Overspeed (aero engines) | 涡轮超速（航空发动机） |
| TOS | Terminate on Site | 在现场终止 |
| TOS | Transition Operational State | 过渡操作状态 |
| TOS | Transfer of Sovereignty (Baghdad, Iraq) | 主权移交（伊拉克巴格达） |
| TOS | Tactical Operator Station | 战术操作员站 |
| TOS | The Operating System | 操作系统 |
| TOS | Traffic Operations System | 交通运营系统 |
| TOS | Transactions on Storage | 存储上的事务 |
| TOS | Trucial Oman Scouts (Unite Arab Emirates) | 休战阿曼童子军（阿拉伯联合酋长国） |
| TOS | Tactical Operations Squadron (USAF) | 战术作战中队（USAF） |
| TOS | The Organic Standard (journal) | 有机标准（期刊） |
| TOS | Type Of Shipment | 装运类型 |
| TOS | Tender of Service | 服务招标书 |
| TOS | Tales Of Symphonia | 交响的故事 |
| TOS | The Other Side | 另一面 |
| TOS | Time on Stream | 运行时间 |
| TOS | Terminal Operating System | 终端操作系统 |
| TOS | Time Of Search | 搜索时间 |
| TOS | Tactical Operations Support (US TSWG) | 战术作战支持（US TSWG） |
| TOS | Testing Operations System | 测试操作系统 |
| TOS | Take-Off-Structure (electric substation structure) | 起飞结构（变电站结构） |
| TOS | Total Outstanding Shares (Canada) | 已发行股份总数（加拿大） |
| TOS | The Original Series (Star Trek) | 原创系列（星际迷航） |
| TOS | Terminate on Sight (G-Unit album) | 立即终止（G-Unit专辑） |
| TOS | Time of Sale | 销售时间 |
| TOS | Tales of Symphonia (video game) | 交响的故事（电子游戏） |
| TOS | Tone Operated Squelch (two-way radio) | 音控静噪（双向无线电） |
| TOS | Top Of Slab (concrete) | 板顶（混凝土） |
| TOS | Terminal Oriented Software | 面向终端的软件 |
| TOS | Time On Station | 车站时间 |
| TOS | Transparent Optical Switch | 透明光开关 |
| TOS | Training Objective Statement | 培训目标声明 |
| TOS | Terminal Oriented System | 终端导向系统 |