The Computer System: Components and Functions

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TABLE OF CONTENTS
TITLE PAGE……………………………………………………….....i DEDICATION……………………………………………………...……..……ii ACKNOWLEDGEMENT……………………………………………...………iii TABLE OF CONTENTS………………………………………….......……….iv

CHAPTER ONE
1.0 INTRODUCTION……………………………………………………….….1

CHAPTER TWO
2.0 THE COMPUTER SYSTEM DEFINITION, HISTORY AND CLASSIFICATION……………………………………………………………..5 2.1 DEFINITION………………………………………………………...…….5 2.2 HISTORICAL DEVELOPMENTS………………………………………5 2.2.1 1ST GENERATION (1940-1956)……………………………….………5 2.2.2 2nd GENERATION (1956-1963)………………………………………..5 2.2.3 3RD GENERATIONS (1964-1971)…………………………...………….5 2.2.4 4th GENERATION (1971-present)………………………………………6 2.2.5 5th GENERATION (present and beyond)……………………..…………6 2.3 CLASSIFICATION……………………………………………………..…..6 2.3.1 DIGITAL COMPUTERS…………………………………………………6 2.3.2 ANALOGUE COMPUTERS……………………………………………..7 2.2.3 HYBRID COMPUTERS………………………………………….………7 2.4 TYPES OF COMPUTERS…………………………………………...……..7 2.4.1MINICOMPUTERS……………………………………………………….7 2.4.2 MICROCOMPUTERS……………………………………………...……..7 2.4.3 MAINFRAMES……………………………………………….………….7 2.4.5 SUPER COMPUTERS………………………………………..…………..7

CHAPTER THREE
3.1 THE CASE………………………………………………………………….8 3.2 MOTHERBOARD………………………………………………………….8 3.3.1 THE PROCESSOR………………………………………………………..9 3.3.2 THE PORTS………………………………………………………………9 3.3.3 THE BUS………………………………………………………...………10 3.4POWER……………………………………………………..…………..10 3.5INPUT DEVICES……………………………………………………….10 3.5.1 THE KEYBOARDS………………………………………………….10-11 3.5.2 THE MOUSE………………………………………………………..…..11 3.6STORAGE……………………………………………………..……….11 3.6.2 THE COMPACT DISKS……………………………………………11-12 3.7BIOS………………………………………………………………..…..12 3.8MEMORY……………………………………………………….….….12 3.81.ROM……………………………………………………………………12 3.8.2RAM……………………………………………………………………12 CHAPTER FOUR

4.0MAINTENANCE AND REPAIRS……………………………………13 4.1 TROUBLESHOOTING…………………………..…………………..13-14 4.2 PREVENTIVE MEASURES ……………………………………………14 CHAPTER FIVE
5.1 SUMMARY…………………………………….………………………..15 5.2 CONCLUSION…………………………………….……………………..15 BIBLIOGRAPHY……………………………………………………………..16

CHAPTER ONE
1.0 INTRODUCTION
A computer system in contemporary usage refers to a desktop system, including the computer itself (aka "The CPU" or "The Box") and all the peripheral devices needed to operate it, usually including: The computer, usually mounted in a tower (vertical) case, including components: the CPU or central processing unit; a mother board or main board, including a BIOS; A graphics card; a sound card (often build onboard, ie. into the mainboard), a variety of disk ports to serve hard drives, disk drives and optical drives, a variety of peripheral ports, including USB ports, legacy serial and parallel ports, and LAN ports, either Ethernet or fire wire. A hard drive (sometimes more) is included for long-term data storage. The case also contains a transformer power supply and a number of fans to keep the internal components cool while operating. A monitor, typically either a CRT or an LCD flatscreen.

A set of speakers to hear sound.
A keyboard, typically a standard 104-key QWERTY keyboard. A mouse, typically a three button mouse with scroll wheel. Other peripherals can be added to the system to augment its functionality. Common ones include: A wi-fi adapter to connect to wireless networks.

A bluetooth adapter to connect to wireless peripherals.
A modem for a direct connection to an internet service provider. A printer to produce (paper) hardcopy
A scanner to input data from hardcopy
all these pieces, pulled together comprise a personal computer system.

CHAPTER TWO
2.0 THE COMPUTER SYSTEM DEFINITION, HISTORY AND CLASSIFICATION.

2.1 DEFINITION
A computer is an electronic machine that takes in data and instructions (input), works with the data (processing), and puts out information (output).

2.2 HISTORICAL DEVELOPMENTS
2.2.1 1ST GENERATION (1940-1956)
in this generation computers were characterized by vacuum tubes which can be found in...
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