| PIIA | Presidents Island Industrial Association (Memphis, TN) | 总统岛工业协会（田纳西州孟菲斯） |
| PIIA | Practitioner with the Institute of Internal Auditors (Institute of Internal Auditors, UK) | 内部审计师协会（英国内部审计师协会）从业人员 |
| PIIA | Proprietary Information and Inventions Assignment | 专有信息和发明转让 |
| PIIA | Peace Initiative International for Africa | 国际非洲和平倡议 |
| PIIA | Proprietary Information and Inventions Assignment Agreement | 专有信息和发明转让协议 |