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Diploma in ICT: Computer Applications I Notes

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Summary

CHAPTER 1: INTRODUCTION TO COMPUTER
APPLICATIONS
Computer Application/Application software
An application program (app or application for short) is a computer program designed to
perform a group of coordinated functions, tasks, or activities for the benefit of the user.
Recall is as the non-physical parts of the computer. A computer uses to get the job done. They
are the instructions given to the computer.Software needs to be accessed before it can be used.
There are many terms used for process of accessing software including running, executing,
starting up, opening, and others.
Types of Software
The three basic types of software are:
- Commercial - prepackaged and is available from software stores and through the
Internet.
- Shareware - developed by individual and small companies that cannot afford to market
their software worldwide or by a company that wants to release a demonstration version
of their commercial product.
- Open source software - created by generous programmers and released into the public
domain for public use.
Software can be used as follows:
- Switch on the computer.
- Open the application software
- Input data
- Processing
- Store/Output
- Close file
- Close the application
- Turn off the computer.
Classification of Computer software
Computer software is classified as follows:
•System Software - Software that handle the running of your computer's hardware.
•Application Software - Software that has been developed to solve a particular problem, or
perform specific task for the user.
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