Post on 08-Aug-2018
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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~