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When used as an adjective, application is not restricted to mean: of or on application software. [6] For example, concepts such as application programming interface (API), application server, application virtualization, application lifecycle management and portable application apply to all computer programs alike, not just application software.
Although this API can be called by an end user with a web browser (as in this example) it is intended to be called automatically by software or by computer programmers while writing software. JSON is intended to be parsed by a computer program, which would extract the URL of the photograph and the other metadata.
An API opens a software system to interactions from the outside. It allows two software systems to communicate across a boundary — an interface — using mutually agreed-upon signals. [3] In other words, an API connects software entities together. Unlike a user interface, an API is typically not visible to users. It is an "under the hood ...
A web application (or web app) is application software that is created with web technologies and runs via a web browser. [ 1 ] [ 2 ] Web applications emerged during the late 1990s and allowed for the server to dynamically build a response to the request, in contrast to static web pages .
Security can improve over that of application software (for example through use of sandboxes and automatic updates), but the extensions themselves remain subject to vulnerabilities and access is often much greater than that of native Web applications. For security purposes, most RIAs run their client portions within a special isolated area of ...
A proprietary application programming interface (API) is a software library interface "specific to one device or, more likely to a number of devices within a particular manufacturer's product range." [53] The motivation for using a proprietary API can be vendor lock-in or because standard APIs do not support the device's functionality. [53]
An open API (often referred to as a public API) is a publicly available application programming interface that provides developers with programmatic access to a (possibly proprietary) software application or web service. [1] Open APIs are APIs that are published on the internet and are free to access by consumers. [2]
API testing is a type of software testing that involves testing application programming interfaces (APIs) directly and as part of integration testing to determine if they meet expectations for functionality, reliability, performance, and security. [1] Since APIs lack a GUI, API testing is performed at the message layer. [2]