| SSO | simultaneously switching outputs | 同时开关输出 |
| SSO | Skate Society Of Oregon | 俄勒冈州滑冰协会 |
| SSO | Shared Storage Option (VERITAS Software Corporation) | 共享存储选项（VERITAS Software Corporation） |
| SSO | Slight Show of Oil (drilling reports) | 轻微漏油（钻井报告） |
| SSO | Switching & Signaling Operations (Sprint) | 转换和信号操作(冲刺) |
| SSO | Senior Scientific Officer (UK) | 高级科学官（英国） |
| SSO | Site Safety Officer | 现场安全员 |
| SSO | Soft Skill Optimierung | 软技能优化 |
| SSO | Space Shuttle Orbiter | 航天飞机轨道器 |
| SSO | Scleroderma Society of Ontario | 安大略省硬皮病学会 |
| SSO | Society of Surgical Oncology | 外科肿瘤学会 |
| SSO | Space Systems Operations | 空间系统操作 |
| SSO | Standard-Setting Organization | 标准制定组织 |
| SSO | Special Systems Operation | 特殊系统操作 |
| SSO | Sandia Site Office | 桑迪亚现场办公室 |
| SSO | Shared Services and Outsourcing | 共享服务和外包 |
| SSO | Ship Security Officer | 船舶安全员 |
| SSO | Speech Service Option | 语音服务选项 |
| SSO | Sanitary Sewer Overflow | 卫生下水道溢流 |
| SSO | System Staff Officer | 系统参谋 |
| SSO | Singapore Symphony Orchestra | 新加坡交响乐团 |
| SSO | Shadow Stalkers Organization | 影子跟踪者组织 |
| SSO | Switch Socket Outlet | 开关插座 |
| SSO | Surveillance Systems Operator | 监控系统操作员 |
| SSO | System Support Office | 系统支持办公室 |
| SSO | Survivors Speak Out (UK support group for those who have attempted suicide) | 幸存者发声（英国支持自杀未遂者团体） |
| SSO | Site Security Officer | 现场安全员 |
| SSO | Studio Symphony Orchestra (Northern Ireland) | 工作室交响乐团（北爱尔兰） |
| SSO | Support System for OEX (Orbital Experiments; NASA) | OEX支持系统（轨道实验；NASA） |
| SSO | Secondary Significant Other (polyamory) | 次要重要其他（多配偶） |
| SSO | Scarborough Symphony Orchestra (UK) | 斯卡伯勒交响乐团（英国） |
| SSO | Satellite Switching Office | 卫星交换局 |
| SSO | Sydney Symphony Orchestra | 悉尼交响乐团 |
| SSO | Special Security Office/r | 特别安全办公室/ r |
| SSO | Simultaneous Switching Output | 同时切换输出 |
| SSO | Senior Staff Officer | 高级参谋 |
| SSO | Supply Support Operations | 供应支持运营 |
| SSO | Saginaw Symphony Orchestra (Saginaw, Michigan) | 萨吉诺交响乐团（密歇根州萨吉诺） |
| SSO | Syracuse Symphony Orchestra (Syracuse, New York) | 雪城交响乐团（纽约雪城） |
| SSO | Source Selection Official | 来源选择官员 |
| SSO | Synchronization Staff Officer | 同步参谋 |
| SSO | Safety/Security Officer | 安全官员 |
| SSO | Sortof Significant Other | 重要其他类别 |
| SSO | System Security Officer | 系统安全员 |
| SSO | School Service Officer | 学校服务主任 |
| SSO | Single Sign On | 单一登录 |
| SSO | School Services Officer | 学校服务主任 |
| SSO | special sense organ | 特殊感觉器官 |
| SSO | Signal Security Office | 信号安全办公室 |
| SSO | Springfield Symphony Orchestra | 斯普林菲尔德交响乐团 |
| SSO | Struck Submerged Object | 撞击浸没物体 |
| SSO | SÜdsÜdost | SÜdsÜdost |
| SSO | Student State Officer | 学生州官员 |
| SSO | Senior Support Officer | 高级支助干事 |
| SSO | Secondary Significant Other | 次要重要其他 |
| SSO | Sao Lourenco, Minas Gerais, Brazil | 巴西米纳斯吉拉斯州圣保罗 |
| SSO | Source Selecting Official | 来源选择官员 |
| SSO | Student Services Office | 学生服务办公室 |
| SSO | Shared Service Organization | 共享服务组织 |
| SSO | Special Security Office | 特别安全办公室 |
| SSO | System Support Organization | 系统支持组织 |
| SSO | Spatial Standard Observer (aeronautics) | 空间标准观察员（航空） |
| SSO | Steady-State Optimization | 稳态优化 |
| SSO | Support Services Organization | 支持服务组织 |
| SSO | Sun Synchronous Orbit | 太阳同步轨道 |
| SSO | Shattered Sun Offensive (gaming, World of Warcraft) | 粉碎的太阳攻势（游戏，魔兽世界） |
| SSO | System Security Office/Officer | 系统安全办公室/军官 |
| SSO | System Synchronization Officer | 系统同步官员 |
| SSO | Suncoast Symphony Orchestra (Tampa Bay, FL) | 太阳海岸交响乐团（佛罗里达州坦帕湾） |
| SSO | Sudano-Sahelian Office (UN) | 苏丹-萨赫勒办事处（联合国） |
| SSO | Sherman Symphony Orchestra (Sherman, TX) | 谢尔曼交响乐团（德克萨斯州谢尔曼） |
| SSO | Starlight Symphony Orchestra (Texas) | 星光交响乐团（德克萨斯州） |
| SSO | Store Specific Order (retailing) | 门店特定订单（零售） |
| SSO | Same-Sex Oriented | 同性取向 |
| SSO | SÜdsÜdost (German; South-South-East) | SÜdsÜdost (German; South-South-East) |
| SSO | Social Security Offset | 社会保障补偿 |
| SSO | Sheriff's Special Officer (Orange County, California) | 警长专用主任,加州橘郡 |
| SSO | Stateful Switch Over (Cisco) | 状态切换（Cisco） |
| SSO | Safety Services Officer | 安全服务专员 |
| SSO | Sammamish Symphony Orchestra (Issaquah, WA) | Sammamish交响乐团（华盛顿州伊萨克） |
| SSO | Swiftwater Safety Operations | Swiftwater安全操作 |
| SSO | Signal Security Office/Officer | 信号保安办公室/军官 |
| SSO | School Support Organization | 学校支持组织 |
| SSO | Sulfolobus Solfataricus | Solfataricus磺胺 |
| SSO | Sud-Sud-Ovest (Italian: South-South-West) | Sud Sud Ovest（意大利语：南南西） |
| SSO | System Supervisor Overview (training course segment) | 系统主管概述（培训课程部分） |
| SSO | Specific Spoilage Organism (food protection) | 特定腐败生物（食品保护） |
| SSO | Swap Statement Operator | 交换语句运算符 |
| SSO | Single Second Order | 单二阶 |
| SSO | Sahara and Sahel Observatory | 撒哈拉和萨赫勒观测站 |
| SSO | Social Security Office | 社会保障办公室 |
| SSO | Scottsdale Symphony Orchestra (Arizona) | 斯科茨代尔交响乐团（亚利桑那州） |
| SSO | Staff Security Officer (NSA) | 参谋安保干事（NSA） |
| SSO | Switch Specific Overhead | 开关特定开销 |
| SSO | Seaward Security Officer | 海上保安员 |
| SSO | Sorry Sold Out | 抱歉售罄 |
| SSO | Single Sign-On | 单一登录 |
| SSO | Service Support Office | 服务支持办公室 |
| SSO | Ship Safety Officer | 船舶安全员 |
| SSO | Special Support Office | 特别支持办公室 |