- p-n Junction
- Boundary or interface between two types of semiconductor material, p-type and n-type, inside a single crystal of semiconductor.
- Operated by air pressure.
- Pneumatic Form
- A concrete roof shape defined by inflating a bladder that gives a form defined by pressure loading.
- PNP Transistor
- Type of bipolar transistor using p-type, n-type, n-type semiconductor material.