Medicine
* Abdominal compartment syndrome, Intra-abdominal pressureOrganizations
* 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 1936-1941Science and technology
* 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 computer programming, 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 variabilityTransportation
* Instrument approach procedure, a published procedure for the final approach for landing at an airport under instrument flight rules * International airportOther uses
* 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 DupreesSee also
* IAPS (disambiguation) {{disambiguation