| SIV | System Information Viewer | 系统信息观察 |
| SIV | Systems Integration Vehicle | 系统集成车辆 |
| SIV | Simple Ideas for Vegans | 素食主义者的简单想法 |
| SIV | Sorry I Vanished | 抱歉我消失了 |
| SIV | Sensors In Vacuum | 真空传感器 |
| SIV | Special Interest Videos | 特殊兴趣视频 |
| SIV | sperm immobilizing value | 精子固定值 |
| SIV | Sieve | 滤器 |
| SIV | Saturn IV Rocket | 土星四号火箭 |
| SIV | Servizio Informazioni del Vaticano (Frontier magazine march 2008, article about extraterrestial contact) | Servizio Informazioni del Vaticano（《前沿》杂志2008年3月，关于外星人接触的文章） |
| SIV | Sound in Video | 视频中的声音 |
| SIV | Special Immigrant Visa (US State Department) | 特殊移民签证（美国国务院） |
| SIV | Swine Influenza Virus | 猪流感病毒 |
| SIV | Simian Immunodeficiency Virus | 猿猴免疫缺陷病毒 |
| SIV | Structured Investment Vehicle | 结构化投资工具 |
| SIV | Silo Interface Vault (missile defense) | 筒仓接口库（导弹防御） |
| SIV | Situs Inversus Viscerum | Inversus Viscerum星 |
| SIV | Small Islands Voice | 小岛屿之声 |
| SIV | Simulation d'Incident en Vol (French: Simulated Incidence in Flight; paragliding) | 仿真'Incident en页(d法国:模拟入射飞行伞) |
| SIV | Safety Interlocks Valid | 安全联锁有效 |
| SIV | Site Initiation Visit | 现场启动访问 |
| SIV | Self-Inflicted Violence | 自我影响的暴力 |
| SIV | Speed Increase Valve | 速度增加阀 |
| SIV | Sorry I Vanished (chat) | 抱歉我消失了（聊天） |
| SIV | Setto Interventricolare (Italian) | Setto Interventricolare（意大利语） |
| SIV | special interest vessel (US DoD) | 特殊利益船舶（美国国防部） |
| SIV | System Integration Van/Vehicle | 系统集成的货车/车辆 |
| SIV | Special Investment Vehicle | 特殊投资工具 |