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System Software

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Hardware & Devices

What Is an Operating System? Core Functions and OS Comparison

By Yasir Hafeez

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October 25, 2026

6 Min Read

An operating system is the base software managing hardware resources and execution environments for applications across desktop, server, and mobile devices.

I'm Yasir Hafeez, a technology writer at Team 4 Solution, where I cover AI and automation, cloud and DevOps, cybersecurity, and business and startup strategy. I hold an MSc in Information Technology and have been writing about technology for two years. I write about the parts practitioners actually ask about rather than the parts that are easy to summarise: what a migration really costs once you count engineer time, where vendor documentation stops being useful, and which trade-offs only matter above a certain scale. When the honest answer is that it depends, I say what it depends on. When I'm not certain, I say that too. If you spot an error in anything here, email me at secure.accesshub@gmail.com and I'll correct it.

System Software

What Is an Operating System? Core Functions and OS Comparison

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