An operating system also called "OS" is the most important software that runs on
a computer. It manages the computer's memory and processes, as well as all of its
software and hardware. Knowing what operating system, you are using will help you
determine which programs can run best in your computer and will allow you to fully
utilize your computer. The three most common operating systems for personal
computers are Microsoft Windows, macos, and Linux while Android is designed for
mobile devices.​