When you define a computer operating system you can begin to understand how this system works. Many people use a computer each day without realizing how their computer really works. Taking some time to learn a little can be very enlightening the next time you turn your computer on. Your operating system is program that allows your computer to communicate with other hardware and software on your computer. Without your operating system your computer would not work or function properly. There are other parts of your computer operating system that also allow your computer to run properly. This can involve security, drivers, process management, memory, input/output, and also drivers.