NPO

Not to be confused with NP0 (ending is zero).

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
• The NPO complexity class, standing for "NP-optimization problem", in computational complexity

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