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

This operating system not only loaded programs automatically, like earlier batch systems, but could also run several at the same time on its single CPU. It did this through clever scheduling.

Called ZARDOS, the operating system is built to run on an Arduino MEGA although a smaller version is available for the Uno. The Arduino is connected by a serial cable to the Minitel terminal.

Apple’s operating systems came with a graphical interface and mouse support. These wouldn’t be commonplace for Windows operating systems until well into the 1990s.

It's a common problem: you've got an old computer you don't want to part with but you can't figure out how to make it useful again. The operating system it came with sucks, and there are plenty of ...

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.

An executive at IBM Tivoli Software offers tips on how to set up a secure operating system.

To some, an operating system is a burden or waste of resources, like those working on embedded systems and other low-power applications. To others it’s necessary, abstracting away hardware so… ...

What's the most secure operating system? If you value your privacy, here's the secure os that will help keep all your information safe online.