| POSA | Preliminary Operation Safety Analysis | 初步运行安全分析 |
| POSA | Pride of Sheffield Ave. (New York fire station) | 谢菲尔德大道的骄傲（纽约消防局） |
| POSA | Pattern Oriented Software Architecture | 面向模式的软件体系结构 |
| POSA | Payments Outstanding Suspense Account | 未付款暂记账户 |
| POSA | Passive Optical Sample Assembly | 无源光学样品组件 |
| POSA | Pomona College Student Art Gallery (Claremont, California) | 波莫纳大学生美术馆（加利福尼亚州克莱蒙特） |
| POSA | Public Order and Security Act | 公共秩序与安全法 |
| POSA | Parks and Open Space Advocates (Seattle, WA) | 公园和开放空间倡导者（西雅图，华盛顿州） |
| POSA | Population Oriented Simulated Annealing | 面向群体的模拟退火 |
| POSA | Pattern- Oriented Software Architecture | 面向模式的软件体系结构 |
| POSA | Pride Of Sheffield Avenue | 谢菲尔德大道的骄傲 |