INTRODUCTION TO COMPUTER

WHAT IS A SYSTEM?

Computer system

1          Input

2          Process

 3         Output

WHAT IS A COMPUTER ?

In general terms, a computer is a high-speed electronic device (machine) used to process data, converting data into information that is useful to people. Any computer (regardless its type) is controlled by programmed instructions, which give the machine a purpose and tell what to do.

Technical meaning

            “A computer is a high speed electronic device which follows instructions and capable of performing arithmetical and logical operation”

Data

Data can be defined as row facts  (it may also be defined unprocessed information).Data can consist of letters (A - Z, a – z) numbers (0 – 9), symbols (@, !, ~, %, #, $, &, ?, ", N, ], Æ, M) sounds, images and other facts. 

Information

Data that has been organized and communicated (Processed Data) in a form convenient for human decision making often referred to as information.

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