sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Professional and Administrative Staff Association | ** |
| Professional Association of SRC Teacher Advisers | ** |
| spectral and spatial selective acquisition | ** |
| Polish Academy of Sciences Theory Aggregation | ** |
| Photosynthesis and Assimilation System Testing and Analysis | ** |
| Po and Apennine Sediment Transport and Accumulation | ** |
| Philadelphia Area Statistics Teachers Association | * |
| Protein Active Site Template Acquisition | * |
| Parent Administrator Student Teacher Association | * |
| Partnership for Acceptance and Support of Technology Accelerated | * |
| Ancient landscapes and rural Structures | * |
| Plateau Astronomical Site Testing in Antarctica | * |