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Chapter Profile
Disk Defragmenter: The memory of a computer is divided into small blocks. The files are stored
in continuous blocks of space in the hard disk. When a file is deleted from the computer, a part
of that space becomes free. When a new file is saved on the computer, some part of it is saved
on the first available free space in the memory. After some time, the files get stored in various
fragments which slows down the speed of the computer.
The Disk defragmenter organises the fragments of files
into continuous blocks to improve performance of the
computer.
Fragmented Disk Defragmented Disk
Virus Scanner: It is used to scan the computer for viruses among files
and folders. It scans the disk each time you insert it into a computer
or whenever the computer is booted. It is also called antivirus
software. Quick Heal, Norton, etc. are examples of these software.
Antivirus
Clickipedia
Booting is a process that loads the operating system and prepares the system for use.
APPLICATION SOFTWARE
It is a program designed to help users perform specific tasks. It is designed to be used by
end-users. Generally, people refer to application software as software. Application software can be
broadly classified into two categories:
Application Software
General Purpose Software Customised Software
Word Presentation Desktop Management Multimedia
Processors Software Systems (DBMS) Software Processors
Spreadsheet Graphics Software Desktop Publishing
Software (DTP) Software
General Purpose Software
General Purpose Software is a type of software that can be used for a variety of different tasks. It
is not designed for one specific task, but can be helpful for many different persons and activities. It
can be used for both commercial and non-commercial purposes.
Types of Software 9

