What is an operating system?
An operating system is the most important software that runs on a computer. It manages the computer's memory and processes
The operating system's job
Your computer's operating system (OS) manages all of the software and hardware on the computer.
Types of operating systems
Operating systems usually come pre-loaded on any computer you buy.
Modern operating systems use a graphical user interface, or GUI (pronounced gooey). A GUI lets you use your mouse to click icons, buttons, and menus, and everything is clearly displayed on the screen using a combination of graphics and text.
the windows GUI
Each operating system's GUI has a different look and feel, so if you switch to a different operating system it may seem unfamiliar at first. However, modern operating systems are designed to be easy to use, and most of the basic principles are the same.
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