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Device Drivers

A device driver is software that enables the operating system to communicate
with the hardware components of the computer. It links devices to the operating
system.

Application Software

Application software is the software designed to be used by the computer user to
perform specific tasks or operations on the computer such as creating a
document, spreadsheet, sending emails, etc. Application software is mostly and
simply called application. Examples of application software:

Word Processing Programs e.g. MS-Word
Browsers e.g. Firefox, Chrome, Internet Explorer, Opera, etc.
Games e.g. Zuma, Mortal Combat, etc.
Media players e.g. VLC, Etc.

How do you get software?
Purchase Software
Free Software

Purchase Software

Software can be purchased at a retail computer store or online and comes in a
box containing all the discs (CD, DVD or Blu-ray), manuals, warranty, and other
documentation.

Free software
Free software is software that does not require you to buy it before using it. The
following are the categories of free software:
Shareware: Shareware is software that gives you a few days to try the
software after which you'll be asked to buy the software, enter a code or
to register the product before you can continue to use it.

Freeware: Freeware is free software that never requires payment, as
long as it is not modified.
Open Source Software: Open source software is completely free
software that does not require payment and allows you to modify the
Source Code (program) or view how it was made.