What is android os? Create a video with Clean, accurate visualization with no errors in text, pictures and explanation. Make it in 4k VIDEO, with no redundant explanation and messy pictures and illustrations, make the illustration in HD with no errors and no messy images or illustrations. Add deep discussion and complete thoughts.
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Android is the world's most popular mobile operating system, powering billions of devices worldwide. Developed by Google and the Open Handset Alliance, Android is built on a modified Linux kernel and designed specifically for touchscreen mobile devices like smartphones and tablets. Its open-source nature has made it the foundation for a vast ecosystem of devices and applications.
Android's architecture is built in layers, each serving a specific purpose. At the bottom is the Linux kernel, which handles core system functions like memory management and device drivers. Above that is the Hardware Abstraction Layer, which provides standard interfaces to hardware components. The next layer contains Native C++ Libraries and the Android Runtime, which executes applications. The Java API Framework provides the building blocks for app development, and at the top are the System Applications that users interact with daily.