AIR is a runtime environment that allows Adobe Animate content and ActionScript 3.0 coders to construct applications and video games that run as a stand-alone executable and behave similar to a native application on supported platforms. A HTML5 application used in a browser does not require installation, while AIR applications require installation from an installer file (Windows and OS X) or the appropriate App Store (iOS and Android). AIR applications have unrestricted access to local storage and file systems, while browser-based applications only have access to individual files selected by users.