| Pilar | Bosque Varela | Christian Doppler klinik | Austria | Neuroscience | Neurology | worldtopscientists.com |
| Pietro | Papa Lopes | Argonne National Laboratory | United States | Energy | Electrochemistry | worldtopscientists.com |
| Piero | Bianco | UNMC | United States | Biochemistry, Genetics and Molecular Biology | Biophysics and Microscopy | worldtopscientists.com |
| Peter | Klco | University of Žilina | Slovakia | Computer Science | automated object detection | worldtopscientists.com |
| Peng | Gu | donghua university | China | Engineering | Ultra-precision machining and testing technology | worldtopscientists.com |
| Pedro | Abreu Sánchez | Servicio de Medicina Nuclear Hospital Universitario Dr. Peset (Valencia) | Spain | Medicine and Dentistry | Cirugía Radioguiada | worldtopscientists.com |
| Pedro | Jose | The George Washington University School of Medicine & Health Sciences | United States | Medicine and Dentistry | Pharmacogenomics of Hypertension | worldtopscientists.com |
| Pawan Kumar | Joshi | Jawaharlal Nehru University | India | Environmental Science | Remote Sensing and GIS | worldtopscientists.com |
| Pawan | Kumar | Indian Institute of Technology Bhubaneswar | India | Engineering | Waste Utilization, Concrete Technology | worldtopscientists.com |
| Pavuluri Srinivasa | Rao | Indian Institute of Technology Kharagpur | India | Agricultural and Biological Sciences | Food Process Engineering | worldtopscientists.com |
| Pavol | Nejedlik | Earth Science Institute v.v.i. of Slovak Academy of Science | Slovakia | Other | Climatology, phenology | worldtopscientists.com |
| Pavan | Kumar | Rani Lakshmi Bai Central Agricultural University | India | Earth and Planetary Sciences | Remote Sensing | worldtopscientists.com |
| PAULVANNA NAYAKI | Marimuthu | Kuwait University | Kuwait | Computer Science | Wireless sensor networks | worldtopscientists.com |
| Paulo | Garcia | UNIFESSPA | Brazil | Chemistry | Química Analítica | |
| Paulo | Lourenço | Research Center in Physical Activity, Health and Leisure (CIAFEL), Faculty of Sport of the University of Porto | Portugal | Other | Physical activity and health | worldtopscientists.com |
| Paul | Takyi-Aninakwa | Southwest University of Science and Technology | China | Engineering | Control Science and Engineering | worldtopscientists.com |
| Paul | Nahas | Lebanese University | Lebanon | Dentistry | Laser, Restorative & Esthetic Dentistry | worldtopscientists.com |
| Patrick | Kayima | Makerere University | Uganda | Social Sciences | Geography | |
| Patrick | SOLE | CNRS, Aix Marseille Univ, Centrale Marseille | France | Decision Sciences | Information Theory | worldtopscientists.com |
| Pathmalal | Manage | University of Sri Jayewardenepura | Sri Lanka | Environmental Science | Microbiology, Eco toxicology, Kidney Diseases, Conservation Biology and Biodiversity, Cyanobacteria, Zoology, Phytoplankton abundance and Water Quality in Fresh water, Marine Ecology and pollution, Xenobiotics | worldtopscientists.com |