DEFINISION OF OPERATING SYSTEMoperating system (OS) is software that manages computer hardware and software resources and provides common services for computer programs. The operating system is an essential component of the system software in a computer system. Application programs usually require an operating system to function.OPERATING SYSTEM JOBSoperating system (OS) manages all of the software and hardware on the computer. Most of the time, there are many different computer programs running at the same time, and they all need to access yourcomputer’s central processing unit (CPU), memory, and storage. The operating system coordinates all of this to make sure each program gets what it needs.TYPES OF OPERATING SYSTEMOperating systems usually come preloaded on any computer you buy. Most people use the operating system that comes with their computer, but it’s possible to upgrade or even change operating systems.
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.
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.
OPERATING SYSTEM FOR MOBILE DEVICES
The operating systems we’ve been talking about were designed to run on desktop or laptop computers. Mobile devices such as phones, tablet computers, and MP3 players are different from desktop and laptop computers, so they run operating systems that are designed specifically for mobile devices. Examples of mobile operating systems include Apple iOS, Windows Phone, and Google Android. In the screenshot below, you can see Apple iOS running on an iPad.
Operating systems for mobile devices generally aren’t as fully featured as those made for desktop and laptop computers, and they aren’t able to run all of the same software. However, you can still do a lot of things with them, like watch movies, browse the Web, manage your calendar, and play games.