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MAINCOMPUTER

SYSTEMTHEME : COMPUTER

HARDWARE

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MAIN COMPUTER SYSTEM

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~ MONITOR~

IS A COMPUTER DISPLAY THAT IS LIKE A

TV MONITOR.

A COMPUTER MONITOR IMAGE IS MADE

UP OF PIXELS (DOTS).

IN GENERAL, THE HIGHER THE

RESOLUTION THE BETTER THE IMAGE.

THE SMALLER DOTS PITCH (TYPICALLYFROM 0.25mm 0.31mm ), THE BETTER

THE IMAGE.

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PIXELS

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~ MONITOR~

THE DIFFERENT TYPES OF DISPLAY

SCREEN ARE:

STANDARD TELEVISION SET

AN ORDINARY HOME TV THAT CAN BE USED FORCOMPUTER OUTPUT.

STANDARD COMPUTER MONITORS

HAD BETTER RESOLUTION THAN TV MONITORS

AND SOME ARE FLAT SCREEN.

LIQUID CRYSTAL DISPLAYS (LCD)

ARE MADE UP OF 2 GLASS PLATES WITH LIQUID

IN BETWEEN.

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~IMAGE~

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~KEYBOARD~

THE MAIN INPUT DEVICE FOR TEXT AND

COMMANDS.

THE KEY ARRANGEMENT SAME WITH AS

TYPEWRITER

CONTAIN STANDARD FUNCTION KEYS

SUCH AS

ESCAPE (ESC) CONTROL (CTRL)

CURSOR MOVEMENT

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KEYBOARDS COME WITH 3 DIFFERENT

TYPES OF PORT :

SERIAL PORT

PS/2 PORT

USB PORT

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~SPEAKER~

GIVE OUT INFORMATION IN THE FORM OF

SOUND

RANGE WIDELY IN QUALITY AND PRICE

TYPICALLY PACKAGED WITH COMPUTER

SYSTEMS IN SMALL PLASTIC BOXES WITH

MEDIOCRE SOUND QUALITY.

THE INTERNAL AMPLIFIER REQUIRES ANEXTERNAL POWER SOURCE KNOWN AS

WALL WART

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~MOUSE~

IS AN INPUT DEVICE USED TO CONTROLTHE MOVEMENTS OF THE CURSOR ORPOINTER ON A DISPLAY SCREEN.

IT HAS RIGHT CLICK, LEFT CLICK ANDDOUBLE CLICK TO FUNCTION

AN OPTICAL MOUSE USES CAMERATECHNOLOGY AND DIGITAL PROCESSING

TO COMPARE AND TRACK THE POSITIONOF THE MOUSE RATHER THAN A BALL ANDROLLERS USED ON PS/2 PORT MOUSE.

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A SMALL LED (LIGHT EMITTING DIODE)

PROVIDES LIGHT UNDERNEATH THE

MOUSE HELPING TO HIGHLIGHT SLIGHT

DIFFERENCES IN THE SURFACEUNDERNEATH THE MOUSE

IT DOES NOT REQUIRE MAINTENANCE OR

REGULAR CLEANING.

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~SYSTEM UNIT~

ALSO KNOWN AS BASE UNIT

IT IS THE MAIN BODY OF A DESKTOP

COMPUTER CONSISTING OF A METAL @

FIBRE ENCLOSURE CONTAINING THEMOTHERBOARD, POWER SUPPLY,

COOLING FANS, INTERNAL DISK DRIVES,

MEMORY MODULES AND EXPANSION

CARD THAT ARE PLUGGED INTO THE

MOTHERBOARD..

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~THE END~