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Fig 1: a screenshot from a software application. Utility software is software such as anti-virus software, firewalls, disk defragmenters and so on which helps to maintain and protect the computer system but does not directly interface with the hardware.
There are three broad classifications: 1  Application software is the general designation of computer programs for performing tasks. 2  System software is a generic term referring to the computer programs used to start and run computer systems including diverse application software and networks.