| Abbreviations | Meaning |
 | PIGLET | Personalized Intelligently Generated Explanatory Text |
 | PII | Plan Individualisé D'Intervention |
 | PIL | Patient Information Leaflet |
 | PINNT | Patients On Intravenous And Nasogastric Nutrition Therapy |
 | PIP | Population Information Program |
 | PIR | Protein Information Resource |
 | PIR-NREF | PIR Non-Redundant Reference Protein Database |
 | PIST | Prévention Information Sida Toxicomanie |
 | PKIDS | Parents Of Kids With Infectious Diseases |
 | PKR | Polycystic Kidney Research Foundation |
 | PLCO | Prostate, Lung, Colorectal & Ovarian Cancer Screening Trial. National Cancer Institute |
 | PLN | Pennsylvania League For Nursing |
 | PLOS | Public Library Of Science |
 | PLWHA (SA) | People Living With HIV/AIDS (South Australia) |
 | PMA | Pakistan Medical Association |
 | PMA | Professional Medical Assistant [periodical] |
 | PMC | PubMed Central |
 | PMCI | PubMed Central International |
 | PMD | Protein Mutant Database |
 | PMJ | Postgraduate Medical Journal |
 | PMP | Patient Of The Month Program [publication] |
 | PMSI | Programme De Médicalisation Des Systèmes D'Information Hospitaliers |
 | PMSI MCO | PMSI Médecine Chirurgie Obstétrique |
 | PMSI SSR | PMSI Soins De Suite Et De Réadaptation |
 | PMSSA | Pain Management Society Of Southern Africa |
 | PN | Prevention Network |
 | PNA | Pennsylvania Nurses Association |
 | PNAS | Proceedings Of The National Academy Of Sciences |
 | PNC MLA | Pacific Northwest Chapter Of The Medical Library Association |
 | PNCB | Pediatric Nursing Certification Board |
 | PNDR | Psychologists Neuropsychotropic Drug Reference |
 | PNHP | Physicians For A National Health Program |
 | PNI | Pacific Neurosciences Institute |
 | PNI | Pharmaceutical News Index |
 | PNP | Pediatric Nurse Practitioner |
 | PNRDS / NHRDP | Programme National De Recherche Et De Développement En Matière De Santé / National Health Research And Development Program |
 | PNSS | Pregnancy Nutrition Surveillance System |
 | PNVS | Pacific Northwest Vascular Society |
 | POA | Pennsylvania Optometric Association |
 | POB | Publication Orthopédique Biomécanique |
 | POC | Parents Of Ostomy Children |
 | POCA | Pediatric Perioperative Cardiac Arrest |
 | POEMS | Patient Oriented Evidence That Matters (Previously JFP Journal Club) |
 | POF | Premature Ovarian Failure |
 | POINTIS | Point Of Care, Team Information System |
 | POIS | Polish Osteogenesis Imperfecta Society |
 | POL | Physicians Online Network |
 | POMBA | Parents Of Multiple Births Association |
 | POPIN | United Nations Population Information Network |
 | POPLINE | Population Information Online |