API - Introduction
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The word to really pay attention to is “Interface”.
What Is An API & What Are They Good For? [Technology Explained] (Build 20100722155716)
An application programming interface ( API ) is a source code -based specification intended to be used as an interface by software components to communicate with each other. An API may include specifications for routines , data structures , object classes , and variables. An API specification can take many forms, including an International Standard such as POSIX or vendor documentation such as the Microsoft Windows API , or the libraries of a programming language, e.g.
