IPN may refer to:

Payments

Instant payment notification Instant payment notification (IPN) is a method for online retailers to automatically track purchases and other server-to-server communication in real time. This allows E-commerce systems the opportunity to store payment transactions, order inform ...

Chemistry

Interpenetrating polymer network An Interpenetrating polymer network (IPN) is a polymer comprising two or more networks which are at least partially interlaced on a polymer scale but not covalently bonded to each other. The network cannot be separated unless chemical bonds are bro ...

, form of chemical copolymer * Isopropyl nitrate, a liquid monopropellant

Industry

* IPN, a type of I-beam used on European standards

Outer space

* Interplanetary Internet * InterPlaNet *

InterPlanetary Network The InterPlanetary Network (IPN) is a group of spacecraft equipped with gamma ray burst (GRB) detectors. By timing the arrival of a burst at several spacecraft, its precise location can be found. The precision for determining the direction of a G ...

, a group of spacecraft equipped with gamma-ray burst detectors

Medicine and anatomy

Infectious pancreatic necrosis Infectious pancreatic necrosis (IPN) is a severe viral disease of salmonid fish. It is caused by infectious pancreatic necrosis virus, which is a member of the Birnaviridae family. This disease mainly affects young salmonids, such as trout or ...

, disease in fish * Interpeduncular nucleus, a region of the brain

Other

Independent Practitioners Network The Independent Practitioners Network (IPN) is an association of practitioners founded in 1994 working in the broad field of human development, especially counselling and the psychological therapies. It is based on a system of peer support and moni ...

association for practitioners in psychotherapy, counselling, and related fields *

Index of Place Names The Index of Place Names (IPN) in Great Britain is published by the Office for National Statistics. The IPN is a list of "places" in Great Britain. For each "place" included, the IPN lists which areas that place is located within, for each of a s ...

in Great Britain * World Bank's Inspection Panel of the World Bank Group * ''Instytut Pamięci Narodowej'' ( Institute of National Remembrance), a Polish historical research institute * ''

Instituto Pedro Nunes Instituto Pedro Nunes (IPN) is a non-profit private organization for innovation and technology transfer based in Coimbra, Portugal. It is named after the Portuguese 16th century mathematician and professor Pedro Nunes, who lived in the city of C ...

'', technology transfer center of the University of Coimbra * '' Instituto Politécnico Nacional'' (National Polytechnic Institute), Mexican university *

International Policy Network The International Policy Network (IPN) was a think tank based in the City of London, founded 1971, and closed in September 2011. It was a non-partisan, non-profit organization, but critics said it was a "corporate-funded campaigning group". IPN ...

(1971–2011), former British think tank * International Polio Network, former name of

Post-Polio Health International Post-Polio Health International (PHI) is a relatively new name for a non-profit organization that officially began its work in 1960. For many years it was known in medical, rehabilitation, and disability circles variously as GINI, or the Internation ...

* IPN, IATA code for

Usiminas Airport Usiminas is one of the largest producers of steel in the Americas, with major steel mills in Brazil with a total capacity of 9.5 million metric tons of steel per year. The company accounts for 28% of total steel output in Brazil. Usiminas has an ...

in Minas Gerais, Brazil *

International pitch notation International is an adjective (also used as a noun) meaning "between nations". International may also refer to: Music Albums * ''International'' (Kevin Michael album), 2011 * ''International'' (New Order album), 2002 * ''International'' (The T ...

, a method to specify musical pitch {{disambig