What is the AOSP?
(Android Central)

Best answer: The Android Open Source Project is the core of the Android software that runs on your phone. It`s free and anyone can modify it but it isn`t enough to power a device on its own. Open and free Android is a free open-source operating system. The AOSP (Android Open Source Project) is free to download, free to alter, free to build into a product that can power just about anything. But it`s not something you`ve ever used when you picked up a phone or other gizmo that runs `Android` because it`s not really a complete operating system. The AOSP isn`t everything you need to power a device but it`s a huge chunk of it. At its heart, Android is nothing more than a platform that anyone can use to run applications plus the bits and pieces needed for it to talk to standard hardware. We tend to think of Android as an operating system for a phone or tablet (or even a watch or television), but it`s just a part of the software needed to get any device to turn on and do things. T...