| Abbreviation | Definition |
|---|---|
| PIER | Physicians Information and Education Resource |
| PIER | Programs in International Educational Resources |
| PIER | Protection Involvement Education and Restoration |
| PIER | Public Information Education Relations |
| PIET | Partners for International Education and Training |
| PIFA | Pacific Islander Festival Association (San Diego) |
| PIL | Partners in Learning |
| PILAR | Performance Improvement and Learning Achievement Recognition |
| PILEI | Programa Interamericano de Linguistica y Ensenanza de Idiomas |
| PILL | Programmed Instruction Language Learning |
| PILM | Proficiency In Lodge Management exam |
| PILOT | Partners Improving Learning On Tests |
| PILOT | Programmed Inquiry Learning Or Teaching |
| PILOTS | Partners in Learning Options for Tremendous Success |
| PIME | Post Initial Ministerial Education |
| PIME | Program of Innovation in Medical Education |
| PIMP | Public Intellectual with Moral Principles |
| PINES | Parent Infant Network for Educational Services |
| PIO | Public Information Officer |
| PIP | Parent Involvement Program |