TNO

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TNO may refer to:

• Franco-Ténois, the widespread community of francophones who reside in the Northwest Territories
• Netherlands Organisation for Applied Scientific Research ({{langx|nl|text=Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek|label=none|link=no}}), an independent research organization in the Netherlands
• Tamarindo Airport (IATA code: TNO), a private airport that serves Tamarindo, Costa Rica
• {{langx|fr|text=Tête nucléaire océanique|label=none|link=no}}, a French thermonuclear warhead
• Thai National Observatory, part of the National Astronomical Research Institute of Thailand
• TNO intestinal model, systems mimicking the digestive tract
• Trans-Neptunian object, any minor planet in the Solar System that orbits the Sun at a greater average distance than Neptune
• Texas and New Orleans Railroad, a railroad in Texas and Louisiana. Was bought by Southern Pacific in 1881, and merged with Southern Pacific in 1961
• The New Order: Last Days of Europe, a mod for the computer wargame Hearts of Iron IV

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