NPO

NPO may refer to:

Medicine

Nil per os, Latin for "nothing by mouth", a medical instruction to withhold oral intake of food and fluids
neurogenic pulmonary oedema

Science

North Pacific Oscillation, a teleconnection pattern in atmospheric conditions over the North Pacific
NP optimization problem, an optimization problem that is NP-hard
NPO, characterizing thermal stability of a capacitor

Organisations

Nonprofit organization
National Portfolio Organisation, a UK-based culture and arts organisation receiving substantial funding from Arts Council England
National Ports Organisation, former part of the UK Department for Transport
National Preservation Office, part of the British Library
Scientific Production Association (Nauchno-Proizvodstvennoye Obyedineniye), a form of scientific research-to-production facility in the Soviet Union and the Russian Federation.
Nederlandse Publieke Omroep (organization) ("Netherlands Public Broadcasting"), governing body of the Netherlands (Dutch) Public Broadcasting System
Nederlands Publieke Omroepbestel ("Dutch public broadcasting system"), the public broadcasting service in the Netherlands
Netherlands Pathfinder Organisation (Nederlandse Padvinders Organisatie), one of the organisations that evolved into Scouting Nederland, the national Scouting organisation
NPO UK Ltd., a chain of stationery and book shops in Northern Ireland, now part of Eason & Son
National Printing Office, one of the three recognized government printers of the Philippines

Other

Nanga Pinoh Airport, by IATA code
Pochuri language, by ISO 639 code

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