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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).
System software: Helps run computer hardware and computer system. Computer software includes operating systems, device drivers, diagnostic tools and more. Programming software: Software that assists a programmer in writing computer programs. Application software: Allows users to accomplish one or more tasks.