Abstract of this article
A computer is a programmable machine designed to perform arithmetic and logical operations automatically and sequentially on the input given by the user and gives the desired output after processing. Computer components are divided into two major categories namely hardware and software. Hardware is the machine itself and its connected devices such as monitor, keyboard, mouse etc. Software are the set of programs that make use of hardware for performing various functions.
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OBJECTIVES
After going through this lesson you would be able to:
· familiarise yourself with characteristics of computers
· identify the basic components of a computer
· explain the importance of various units of a computer
· differentiate between system software and application
· software
· explain the importance of operating system
· get acquainted with open source
· appreciate the need of computer security
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