API

(Computers) interface which enables an application program to communicate with the operating system and other services provided by the operating system (also helps create similar user interfaces within computer programs)

API as a three-letter acronym may refer to:Academic Performance Index, (California)Academic Programs International, the provider of study-abroad programmesActive Pharmaceutical IngredientAir Pollution Index in Hong Kong, the French name for IPA American Petroleum InstituteAnimal Protection InstituteAPI gravity, a measure of the density of petroleumApplication programming interface, a term related to computer softwareAsian-Pacific Islander, an abbreviation often used in racial demographicsAtmospheric pressure ionization, a term in chemistry and mass spectrometryAustralian Property Institute, formerly known as the Commonwealth Institute of ValuersAutomated Processes Inc., high end recording studio equipment manufacturersAviation Partners Inc.Aviation Preflight Indoctrination, the initial phase of US Naval Aviation trainingArmor Piercing Incendiary, an ammunition designation
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An application programming interface (API) is a source code interface that an operating system or library provides to support requests for services to be made of it by computer programs.
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API, Application Program Interface, (Computers) interface which enables an application program to communicate with the operating system and other services provided by the operating system

Application Program Interface, part of the operating system which supplies applications with a uniform user interface, API

n. bee, type of flying insect

n. non-alcholic beverage made of corn (Andes)