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Introuction

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Submitted By CookieMuncher
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1. INTRODUCTION
Specification point: Define a computer system
Computers today are all around us in one shape or another.
Whilst you are reading this page – how many computers are you aware of in the room? Maybe you are in a classroom right now and you are near to a:
 Mobile phones
 Calculator
 Watch
 Interactive white board
 Projector
 Printer
 Desktop computer
 Laptop
And more probably. The point is that computers come in all shapes and sizes and are often built into other devices. But they share some common features.
This mini-web will introduce you to a computer system.
2. A computer system
A computer system is one that is able to take a set of inputs, process them and create a set of outputs. This is done by a combination of hardware and software.
This diagram below shows you the idea of a computer system in its most basic form
The computer system has one or more inputs to provide data. This data is then processed in some way. The outcome of the processing is sent to an output or it may be stored until some event happens to cause it to be output.
For processing to take place, there needs to be a set of instructions of what needs to be done. This set of instructions is called a program.
This system is called a stored-program computer.
The very first computer in the entire world of this type was built in Britain in 1949 and was called the Manchester Mark 1.
The beauty of this type of computer system is that it is flexible-the machine performs a different task by simply loading a different program from storage.
What is Hardware?
Hardware is a generic term for any part of the computer that you can physically touch, pick up, hold, move around the room etc. In other words, hardware are the physical parts that make up the computer.
Examples of external hardware (not inside the computer):
 Monitor - so you can see what you are working on

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