sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Personalised Information Education and Support | *** |
| Preliminary Innovation Evaluation System | *** |
| Product Information Exchange Standards | ** |
| Pontchartrain Institute for Environmental Sciences | ** |
| Protein Interaction Extraction System | ** |
| Personnel Information Exchange System | ** |
| Program in Indo European Studies | ** |
| Prevention Information Exchange System | ** |
| Protein Interaction Extraction Systems | ** |
| Palestinian Israeli Environmental Secretariat | ** |
| Project Impact Evaluation System | ** |
| Positive Interventions and Effective Strategies | ** |
| Philippine International English School | ** |
| Proximity Immediacy Expectancy Simplicity | ** |
| Probability in Engineering and the Sciences | * |
| Partners in Integrated Earth Systems | * |
| Prostate Interactive Educational System | * |
| Program for Instructional Effectiveness Support | * |
| Program for International Exchange Study | * |
| Public Information Emergency System | * |
| Paris Internet EXchange Service | * |
| Program In Environmental Studies | * |
| Pangea International Earth Science | * |
| Photo Imaging Enhancement System | * |