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System software (Operating system (What does the operating system do?…
System software
Operating system
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The operating system performs many tasks such as resource allocation,scheduling ,data management and input/output control.
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Utility programs
A piece of software that performs a specific and useful task,for example compressing files, or defragmenting the hard disk.
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Defragmentation software
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Files are stored on a hard disk in 'small segments' and a
special table, a catalogue, on the hard disk keeps track of which segment belongs to which file.
As the hard disk
fills up, files begin to be stored in segments far away from each other.
So a utility called a "degfragger" will arrange
the file segments next to each other, so speeding up file access once more.
This eventually causes the system to slow
down as the hard disk struggles to put a file back together again.