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

Earlier this month, I spent a day working in the throwback world of DOS. More specifically, it was FreeDOS version 1.1, the open source version of the long-defunct Microsoft MS-DOS operating system.

It is the basic for the current Windows operating system. When people use the term DOS, they are commonly referring to Microsoft DOS or MS-DOS. This term was viewed 8,059 times.

If you don't know what the Linux desktop operating system is, or if you're new to it, Jack Wallen's quick explainer will get you up to speed.

An operating system that is designed for a server. Normally, it is a complete operating system with file, task and job management; however, with some earlier products, it was a separate component ...