NPO

NPO may refer to:

• Nil per os, Latin for "nothing by mouth", a medical instruction to withhold oral intake of food and fluids
• Nonprofit organization
• National Ports Organisation, a British governmental organisation set up by Barbara Castle MP
• National Preservation Office, part of the British Library
• Nauchno-Proizvodstvennoye Obyedineniye (Научно-производственное объединение, Russian for "Scientific and Production Establishment"), title often found in the names of successors to the Experimental Design Bureaux (OKB) of Communist times
• Nederlandse Publieke Omroep (organization) (in English: "Netherlands Public Broadcasting"), abbreviated as NPO, the Dutch public broadcasting organization that administers the public broadcasting service in the Netherlands
  • Dutch public broadcasting system (Nederlands publieke omroepbestel), 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
• North Pacific Oscillation, an atmospheric teleconnection pattern
• NP optimization problem, optimization problems that are NP-hard
• NPO UK Ltd., a company which had stationery and book shops around Northern Ireland, bought by and rebranded Eason & Son