You’ll all be familiar with the PC, the ubiquitous x86-powered workhorse of desktop and portable computing. All modern PCs are descendants of the original from IBM, the model 5150 which made … ...

An operating system (OS) is software that manages computer resources, controls program execution, and provides a user interface ...

Apple’s Lisa project might be the most loaded chapter in the company’s lore, and thanks to the Computer History Museum, you’ll soon be able to play around ...

Yesterday was the 30th anniversary of Windows 95, the operating system that revolutionized personal computing and introduced ...

The original operating system for IBM PC compatible computers. It is the basic for the current Windows operating system. When people use the term DOS, they are commonly referring to Microsoft DOS ...

What does PC operating environments actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

What does operating system actually mean? Find out inside PCMag's comprehensive tech and computer-related encyclopedia.

Curious about dual-booting on a PC? Learn what it is, how it works, and why running two operating systems might be worth trying.

Patrick Marshall answers questions about how to find out if you have a pirated version of a Windows operating system and how secure are VPNs.