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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.
The term 'software' refers to the set of electronic program instructions or data a computer processor reads in order to perform a task or operation. There are two main types of software: systems software and application software. Systems software includes the programs that are dedicated to managing the computer itself, such as the operating system, file management utilities, and disk operating system (or DOS).