The Google Android OS, developed by the Open Handset Alliance, is based on the Linux kernel and supports a variety of applications for smartphones, leveraging the Java programming language. Multiple versions exist, including Gingerbread, Eclair, Froyo, and Honeycomb, each offering unique features for developers. As an open-source technology, Android provides full access to framework APIs, supports multitasking, and enables applications akin to those found in app stores for other platforms.