Computer Software and its types. Two types of Computer Software : Application Software and System Software.

4. Application Software includes program that do real work for
user.
Application Software helps user solve particular problems and is
created to perform specific tasks for a user.
It is also known as application package.
Application Software is used to perform various applications on
the computer.

6. System Software is a set of programs to control and manage the
operations of a computer hardware.
It enables application programs to execute properly.
It consists of the basic operations as follows:
Saving data on disk.
Making computer to work for us.
Printing a document etc.

8. Operating System(OS) is a set of programs
that controls the computer hardware and acts
as an interface with application programs.
Application programs usually require an
operating system to function.

9. LINUX

12. WINDOWS 95

16. Utility Program is a system software that
allows a user to analyze, configure and maintain
the computer.
It performs a specific task related to the
management of computer.

18. Antivirus or anti-virus software (often abbreviated
as AV), sometimes known as anti-malware software,
is computer software used to prevent, detect and
remove malicious software.
Antivirus software was originally developed to
detect and remove computer viruses.

19. Disk cleaners are computer programs that find and delete
potentially unnecessary or potentially unwanted files from a
computer.
The purpose of such deletion may be to free up disk space,
to eliminate clutter or to protect privacy.

20. Disk Defragmenter is a utility in Microsoft
Windows designed to increase access speed
by rearranging files stored on a disk to
occupy storage locations, a technique
called defragmentation.
Defragmenting a disk minimizes head
travel, which reduces the time it takes to
read files from and write files to the disk.

21. A Device Driver is a computer
program that operates or
controls a particular type
of device that is attached
to a computer.