The Maestro of Your Machine: Core Functions of an Operating System

edited June 11 in PC Tech

You may have a PC with all the top-tier components and features you could want—a powerful processor, lightning-fast memory, and vast storage space, just to name a few—but without an operating system (OS), you wouldn’t be able to use any software on your computer. What exactly is an OS, and what is its role in running your PC? Let’s take a closer look. 

An operating system is a foundational software that allows your computer, smartphone, and other digital devices to function. The OS acts as a bridge between the user and the intricate hardware. Think of it as the maestro of an orchestra, ensuring that all your PC components work together in perfect harmony. 

The OS performs several critical functions, such as managing both hardware and software resources. It ensures that resources like memory and processing power are allocated efficiently to various applications without interference. It handles communication between different hardware components like the keyboard, mouse, and printer. The OS also handles file system management. It creates and organizes folders, saves and retrieves documents, and manages files on storage devices to facilitate efficient data access. 

When you double-click an application icon, it’s the OS that loads the program into memory, allocates resources, and ensures its proper execution. It also oversees the creation, scheduling, and termination of processes to ensure that multiple software programs can run simultaneously without conflicts. Additionally, the OS implements security measures like password protection and permission controls. This protects your computer from unauthorized access, malicious software, and other security threats. 

Most of the vital functions of an OS are invisible to the user, but here’s one you’ll know well. The OS provides a user interface (UI) that allows you to interact with the system easily. This includes the desktop, menus, icons, and windows that you see and use daily. Your operating system’s UI enables you to give instructions, manage files, and access applications. 

The Big Three: A Look at Popular Operating Systems 

When it comes to operating systems, there are three major players: Windows, macOS, and Linux. While the core functionalities remain the same, these different operating systems all have unique strengths and cater to different user preferences. 

Microsoft Windows is the world’s most used operating system for desktop PCs. Windows 10 is the current mainstream version, with Windows 11 still lagging behind despite it being the most recent release. Although the OS has evolved significantly since its 1985 launch, the user-friendly interface with familiar icons and menus has kept it accessible to a broad audience. Aside from including productivity tools like Microsoft Office applications, which are widely used in various industries, Windows is also compatible with a vast array of programs and devices. PC gaming enthusiasts also prefer Windows, as it has the largest library of games compared to other operating systems. This is a chicken-and-egg situation, as most game developers prioritize releasing their titles on Windows due to its dominant market share and the extensive user base. The latest and most popular games are often available on Windows first, if not exclusively. (Want to see for yourself? Load Steam on a capable gaming PC like the Acer Nitro 17 Gaming Laptop.) 

Developed by Apple Inc., macOS is the operating system for Mac computers and is known for the user experience provided by its sleek design and clean, intuitive interface. One of the strengths of macOS is its seamless integration with other Apple products, such as iPhones and iPads, allowing for smooth transitions between devices through features like Handoff, AirDrop, and Continuity. Another advantage is its stability and security, making it less prone to malware and viruses compared to other operating systems. While it also boasts a robust software library like Windows, macOS has been traditionally favored by creative professionals, such as graphic designers and video editors, due to the superior performance of its multimedia software. Many industry-standard creative applications, like those in the Adobe Creative Suite, also tend to run more smoothly on Apple computers. 

The open-source Linux operating system is often seen as the tech-savvy choice. Its source code is freely available for anyone to view, modify, and distribute, thus allowing for unmatched customization and community-driven development. This flexibility, coupled with Linux’s stability and efficiency, makes it popular among developers and power users. Most supercomputers use Linux because of these unique advantages, as researchers can fine-tune the OS for peak performance on the supercomputer’s unique hardware architecture. Unlike Windows and macOS, Linux is not a single OS but a family of distributions (or distros) that cater to different user needs. Popular distros include Ubuntu, Fedora, and Debian. 

You’re also undoubtedly familiar with the two operating systems dominating the realm of mobile devices, Android and iOS. Developed by Google, Android is the most widely used mobile operating system in the world, powering a vast majority of smartphones and tablets. Apple’s iOS is exclusive to iPhones and iPads, and is known for its tight integration with the entire Apple hardware and software ecosystem. 

In short, Windows might be the right OS for you if compatibility and versatility are your priorities. (Or gaming, perhaps!) For a design-centric experience with tight hardware integration, Mac OS could be the answer. And if you’re a tech enthusiast who values customization and power, Linux might be your perfect match. 

No matter which operating system you use, keeping it up to date is crucial. OS updates not only introduce new features that enhance functionality and user experience, but also deliver critical security patches and bug fixes. By staying current, you can protect your PC from threats, ensure compatibility with new software and hardware, and maintain the best possible user experience. 

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About Micah Sulit: Micah is a writer and editor with a focus on lifestyle topics like tech, wellness, and travel. She loves writing while sipping an iced mocha in a cafe, preferably one in a foreign city. She's based in Manila, Philippines. 



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