What Is an Operating System?

Operating systems are important forms of software that manage computer processes. They interact with a device’s hardware and coordinate the functions between software and applications, enabling devices to run smoothly. Laptops, desktops, and mobile phones all have operating systems that manage their software and hardware functions. 

Globally, Microsoft's Windows operating system has the greatest share of the market, an honour it's held for over a decade. Apple's macOS is in the second spot, followed by Apple's iOS, Android, and Chrome OS, which comprise the rest of the top five [1].

The functions of operating systems include:

• Memory management: Operating systems coordinate applications to allocate device space for various programs.

• Process management: Operating systems determine the use of the central processing unit and for how long through scheduling. 

• Security: Operating systems have specific features to prevent cyberattacks, encrypt files, and control who has access to certain files. 

• Booting: Operating systems control the process of powering up systems. 

• Disk management: The operating system manages all disks and drives installed in a computer, such as flash drives and hard drives.

• User interface: The user interface allows users to input and receive information through methods, such as code or type commands. 

The two main components of an operating system are the kernel and shell. The kernel controls most operating system tasks, such as memory and process management, and any interaction between installed software and the device's hardware. The shell controls files and programs through programming languages and enables interactions between the kernel and the user.

Common types of operating systems

Since computers and mobile devices serve different purposes, they rely on different types of operating systems. Here are some of the most commonly used operating systems:

General purpose operating systems

Desktop and laptop computers use general purpose operating systems. Designed for Apple desktops and laptops, macOS is a popular operating system known for its simplicity and user-friendly experience that is continuously improved upon. MacOS is also known for limiting bugs and protecting well against hackers. 

Microsoft also has its own operating system, Windows, which comes installed on most new personal computers. Microsoft releases new versions of Windows every three to five years.

Mobile operating systems

An example of a mobile operating system is Apple iPhone’s iOS system. Apple’s system has regular updates to expand the capabilities of its mobile device software, even for older models. 

Android is the other common operating system for mobile devices. Unlike Apple, it is available on devices built by numerous manufacturers. 

Get started in IT with Coursera.

Operating systems are essential for managing computer processes, coordinating hardware and software functions, and enabling devices like laptops, desktops, and mobile phones to operate smoothly. Learning how to work with operating systems can be helpful if you pursue a career in information technology.

You also may consider earning the Google IT Support Professional Certificate on Coursera. With this program, you’ll learn job-ready skills in information technology, including computer assembly, debugging, wireless networking, and more from an industry leader.