IAP

Medicine

Adventist Church of Promise (Portuguese: Igreja Adventista da Promessa), evangelical Christian church based in Brazil
Fraunhofer Institute for Applied Polymer Research, a German institute operated by the Fraunhofer Society
Independent American Party of Nevada, the Nevada Constitution Party affiliate
Information Age Publishing, American academic publisher in Charlotte, North Carolina
Institut d'astrophysique de Paris (Paris Astrophysical Institute), a French scientific organization
Institution of Analysts and Programmers, an international institution for professions involved in the analysis, development and testing of software
Integrated Applications Promotion, a European Space Agency programme for developing applications of space-based technology
InterAcademy Panel, an international organization for cooperation of science academies
International Academy of Pathology, an international organization dedicated to the advancement of Pathology through educational exchanges worldwide.
International Association of Prosecutors, a non-governmental organisation established by the United Nations in 1995
Irish Academic Press, independent Irish academic publisher based in Newbridge, County Kildare
Islamic Association of Palestine, a defunct Islamic fund-raising organization
Italian African Police (Polizia dell'Africa Italiana), the police force of Italian-controlled areas in Africa in 1936-1941

Identical ancestors point, a point in time in the past where every living member of a species at that time is either an ancestor to all living of that species or none living
Identity-Aware Proxy, part of the Google Cloud Platform, that uses identity and context to guard access to your applications and VMs
Imaging atom probe
In-app purchase, a way of purchasing virtual goods in mobile applications
In-application programming, a way to program computer logic devices while they are being operated by the system
Indanylaminopropane, an uncommon psychoactive chemical sometimes compared to MDMA
Index of air purity, a measure of air quality
Inhibitor of apoptosis, a protein family involved in the suppression of programmed cell death (apoptosis)
Integrated automation platform
Integrin Associated Protein or CD47 protein
Internet access provider, also known as an Internet service provider
Intrapartum antibiotic prophylaxis, for Group B streptococcal infection
IPTV Application Platform, an IPTV application platform from Ericsson
Indoor Air Pollution Indoor air quality
Intracisternal A particle, a retrotransposable element subfamily linked to epigenetic variability

Instrument approach procedure, a published procedure for the final approach for landing at an airport under instrument flight rules
International airport

Independent Activities Period, held at MIT every year immediately after winter vacation
The Italian Asphalt & Pavement Company, a former name of the American musical group The Duprees