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The word software is also sometimes used in a more narrow sense, meaning application software only. At the lowest level, executable code consists of machine language instructions specific to an individual processor âtypically a central processing unit (CPU).
Part of the Computing fundamentals glossary: System software is a type of computer program that is designed to run a computerâs hardware and application programs. If we think of the computer system as a layered model, the system software is the interface between the hardware and user applications. The operating system (OS) is the best-known example of system software. The OS manages all the other programs in a computer.