Operating System Software - Computer Definition
Software managing the computer hardware. Operating systems vary in their make-up because they are organized in different ways, and designing a new Operating System is a major undertaking. Because an Operating System is complex, it has to be designed one piece at a time. Moreover, each piece needs to be a well-defined section of the systems, with well defined inputs. For PCs, the most popular current operating system software is the Microsoft Windows family, but experts project that Linux will replace Windows on at least one-fifth of all computer systems by 2010.
See Also: Linux.
A system software component that is external to the operating system kernel. If the phrase is used to refer to the operating system itself, it is redundant because an operating system "is" software. It must refer to an auxiliary component of the operating system in contrast to an application. See operating system.