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Learn to cook perfectly creamy stovetop mac and cheese—then try 9 delicious ways to change it up for future meals. From veggie-packed to rich and spicy, these easy dinners will be your family's new favorites. You can use our basic formula, or select from the variations below. Basic Mac and Cheese Formula. OS X 10.9 – Mavericks; OS X 10.8 – Mountain Lion; Mac OS X 10.7 – Lion; Mac OS X 10.6 – Snow Leopard. MacOS 10.15 Catalina support: Current Microsoft NTFS for Mac by Paragon Software version (15.5.106) supports macOS 10.15 Catalina. It can be downloaded from our web-site, or from MyParagon portal. General, NTFS for Mac OS X Tags.

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What is an operating system?

Learn to cook perfectly creamy stovetop mac and cheese—then try 9 delicious ways to change it up for future meals. From veggie-packed to rich and spicy, these easy dinners will be your family's new favorites. You can use our basic formula, or select from the variations below. Basic Mac and Cheese Formula. OS X 10.9 – Mavericks; OS X 10.8 – Mountain Lion; Mac OS X 10.7 – Lion; Mac OS X 10.6 – Snow Leopard. MacOS 10.15 Catalina support: Current Microsoft NTFS for Mac by Paragon Software version (15.5.106) supports macOS 10.15 Catalina. It can be downloaded from our web-site, or from MyParagon portal. General, NTFS for Mac OS X Tags.

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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, as well as all of its software and hardware. It also allows you to communicate with the computer without knowing how to speak the computer's language. Without an operating system, a computer is useless.

Watch the video below to learn more about operating systems.

Looking for the old version of this video? You can still view it here.

The operating system's job

Your computer's operating system (OS) manages all of the software and hardware on the computer. Most of the time, there are several different computer programs running at the same time, and they all need to access your computer'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 systems

Operating systems usually come pre-loaded 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. The three most common operating systems for personal computers are Microsoft Windows, macOS, and Linux.

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.

Microsoft Windows

Microsoft created the Windows operating system in the mid-1980s. There have been many different versions of Windows, but the most recent ones are Windows 10 (released in 2015), Windows 8 (2012), Windows 7 (2009), and Windows Vista (2007). Windows comes pre-loaded on most new PCs, which helps to make it the most popular operating system in the world.

Check out our tutorials on Windows Basics and specific Windows versions for more information.

macOS

macOS (previously called OS X) is a line of operating systems created by Apple. It comes preloaded on all Macintosh computers, or Macs. Some of the specific versions include Mojave (released in 2018), High Sierra (2017), and Sierra (2016). 2dponggame mac os.

According to StatCounter Global Stats, macOS users account for less than 10% of global operating systems—much lower than the percentage of Windows users (more than 80%). One reason for this is that Apple computers tend to be more expensive. However, many people do prefer the look and feel of macOS over Windows.

Check out our macOS Basics tutorial for more information.

Linux

Linux (pronounced LINN-ux) is a family of open-source operating systems, which means they can be modified and distributed by anyone around the world. This is different from proprietary software like Windows, which can only be modified by the company that owns it. The advantages of Linux are that it is free, and there are many different distributions—or versions—you can choose from.

According to StatCounter Global Stats, Linux users account for less than 2% of global operating systems. However, most servers run Linux because it's relatively easy to customize.

To learn more about different distributions of Linux, visit the Ubuntu, Linux Mint, and Fedora websites, or refer to our Linux Resources. For a more comprehensive list, you can visit MakeUseOf's list of The Best Linux Distributions.

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Operating systems for mobile devices

The operating systems we've been talking about so far were designed to run on desktop and 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 and Google Android. In the screenshot below, you can see 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.

To learn more about mobile operating systems, check out our Mobile Devices tutorials.

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