| PWSA | Prader-Willi Syndrome Association | Prader-Willi综合征协会 |
| PWSA | Prader- Willy Syndrome Association | 普拉德-威利综合征协会 |
| PWSA | Progressive Women's Spiritual Association | 进步的妇女的灵性的协会 |
| PWSA | Provincial Women's Softball Association | 各省、自治区、直辖市的女子垒球协会 |
| PWSA | Professional Women Singers Association | 职业女歌手协会 |
| PWSA | Pittsburgh Water and Sewer Authority | 匹兹堡供水和污水管理局 |
| PWSA | Program for Women and Successful Aging | 妇女与成功老龄化计划 |
| PWSA | Prince William Sound Adventures | 威廉王子声音历险记 |
| PWSA | Ports and Waterways Safety Act | 港口和水道安全法 |
| PWSA | Pittsburgh Water and Sewer Authority (Pittsburgh, PA) | 匹兹堡水和下水道管理局（宾夕法尼亚州匹兹堡） |
| PWSA | Printed Wide-Slot Antenna | 印刷宽槽天线 |
| PWSA | Port and Waterways Safety Act of 1972 | 1972年港口和水道安全法 |