NPN
# NPN

NPN may refer to:

## Science and technology

* Next Protocol Negotiation, in computer networking
* Non-protein nitrogen, an animal feed component
* NPN transistor
* Normal Polish notation, in mathematics

## Organisations

* National Party of Nigeria, a former political party
* New Politics Network, a UK think tank

## Other uses

* Natural Health Product Number, required by the Canadian Natural Health Products Directorate
