System software is closely related to, but distinct from operating system. It is a computer software that provides the infrastructure over operating system which programs can operate, i.e. it allows application programs to perform different task on the computer.
Operating systems, such as Microsoft Windows NT, Mac OS X or Linux, builds a virtual machine for the system software what they can use. System software is software that basically allows the user to work.
In general application programs are software that enable to perform specific, such as word processing or image manipulation.
System software performs tasks like transferring data from memory to disk, or rendering text onto a display device. System software can be classified as operating system. An operating system creates an interface between other software and the system hardware, while system software will refine or allow greater interaction with the user.
System software helps use the operating system and computer system. It includes diagnostic tools, compilers, servers, windowing systems, data management programs and more. The purpose of systems software is to insulate the applications programmer from the details of the particular computer complex being used, especially memory.
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