Application software includes programs that perform specific tasks for users like solving problems or performing applications. System software controls and manages computer hardware operations to enable application programs to run properly through functions like saving data, printing documents, and making the computer work. Operating systems act as an interface between application programs and computer hardware, allowing applications to function. Utility programs perform specific management tasks related to maintaining the computer. Antivirus software prevents, detects, and removes malicious software like computer viruses. Disk cleaners delete unnecessary files to free up disk space or protect privacy. Disk defragmenters rearrange stored files to reduce access time. Device drivers control attached devices like printers or scanners.

1. Computer 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. 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.

11. 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.

12. 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.

13. 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.

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