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Android is a mobile operating system developed by Google, based on a modified version of the Linux kernel and other open source software. First released in 2008, it's designed primarily for touchscreen mobile devices like smartphones and tablets. Android features a user interface based on direct manipulation using touch gestures, supports Google Play Store for app distribution, and provides extensive APIs for developers. The OS uses a permission-based security model, supports multitasking, and enables deep customization through its open nature. Regular version updates bring new features and security improvements, with each major release named alphabetically after desserts until Android 10.