Android is one of the leading operating system in the world. The software currently occupies more than 80% of the world market when it comes about smartphone.
Android - Brief Introduction
This software was developed by Google and it is based on Linux Kernel and a few open source software. In the time when every manufacturers were spending huge amount on their software, Google kept its software completely open source. It allowed different manufacturers to use this software and modify the UI according to their needs.
It has an easy interface and amazing customer UI which allow users to easily manage their apps and games. Not only this, you can also get time to time updates from your manufacturers which fix all bugs and add more improvement.
Currently, Android Pie is the latest Android version out there. It's the 16th major version of this software. If you take look at all versions' history, then you can notice the alphabetical naming with all versions.