| PAIS | Privacy and Anonymity in the Information Society (Workshop) | 信息社会中的隐私和匿名（研讨会） |
| PAIS | Portable Ada Interface Set | 便携式Ada接口套件 |
| PAIS | Public Affairs Information Service | 公共事务信息服务 |
| PAIS | Partial Androgen Insensitivity Syndrome | 部分雄激素不敏感综合征 |
| PAIS | Photo Acoustic Infrared Spectroscopy | 光声红外光谱 |
| PAIS | Phosphoribosylaminoimidazole Synthetase | 磷酸核糖基氨基咪唑合成酶 |
| PAIS | Program and Integration Support (contract) | 项目和集成支持（合同） |
| PAIS | Prototype Advanced Indications System | 原型高级指示系统 |
| PAIS | Process Appraisal Information System (SEI) | 过程评估信息系统（SEI） |
| PAIS | Path Alarm Indication Signal | 路径报警指示信号 |
| PAIS | Padre Island National Seashore (US National Park Service) | 帕德岛国家海岸（美国国家公园管理局） |
| PAIS | psychosocial adjustment to illness scale | 疾病心理社会适应量表 |
| PAIS | Physicians Appointment Information System | 医生预约信息系统 |
| PAIS | Prestigious Applications Of Intelligent Systems | 智能系统的著名应用 |