- Physics: The study of the properties of matter and energy.
- Physiography: The science of physical geography.
- Physiology: The study of functioning of the various organs of living beings.
- Plasma Physics: The study of charged particles interacting with each other under electric and magnetic fields.
- Podiatry: The study of the disorders of foot and ankle.
- Pomology: The study of the cultivation, harvesting and storage of pome fruits.
- Psychology: The study of human and animal behavior.
- Pulmonology: The study of diseases related to the respiratory tract.
- Quantum Mechanics: The study of microscopic material using the properties of physics.
- Queer Studies: The study of issues related to sexual orientation and gender identity.