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podcast (Input devices (Keyboard (Inputing characters), Mouse (moving a…
podcast
Input devices
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Mouse
moving a point around the screen, selecting by clicking on the icon
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Barcode scanner
read data on bar, retrieve the of prices, useful when price changes
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Hardware
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Memory
ROM
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Nonvolatile, stored when power is lost.
RAM
Random access memory, more RAM, faster the computer would be
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All component all attached to mother board, video card(high quality could be used for games), audio card
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Computer systems
Laptop
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MAC books recently popular, has small screen and keyboad
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Digital watch, washing machines....
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Output Devices
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Printer
Laser printer
high quality and large amount, usually used in school
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Thermal printer
producing image by heating the thermal paper, part heated turns black
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Secondary storage
Flash memory
memory car such as mobile phones, camera,USB sticks
quickly transfer to the PC- small size, easy lost
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Hardisks- large store capacity, can be access quickly, inexpensive
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Primary storage
Primary
CPU Direct access, continuing read the data
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ROM
stored basic instruction, BIOS, basic input output system- primary load and run the operating system
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Cache
take data from the most recent data,small