TPN

TPN may refer to:

Science and Medicine

 * Total parenteral nutrition
 * Triphosphopyridine nucleotide, the previous name for nicotinamide adenine dinucleotide phosphate (NADP+)
 * Task Positive Network, see Dorsal attention network

Organisations

 * Towarzystwo Przyjaciół Nauk (Society of Friends of Science) in Warsaw

Other

 * Third-party note or Note verbale, a diplomatic document
 * Tupinambá language, by ISO 639 code
 * Tiputini Airport, Ecuador
 * Treaty on the Prohibition of Nuclear Weapons
 * "The Promised Neverland" (Manga / Anime Series)