computer hardware. what is hardware? hardware is any part of a computer you can touch there are 2...
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Computer Hardware
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What is Hardware? Hardware is any part of a computer
you can touch
There are 2 categories: Inside the computer Peripherals connected to the computer
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Functions of Hardware
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Inside a Computer
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What Goes Into a Computer?
Computers store information as bits (binary digit) A byte represents 8 bits 1 kilobyte(KB) is 1000 bytes 1 megabyte(MB) is 1 000 000 bytes 1 gigabyte(GB) is 1 000 000 000 bytes
i.e. 1000 MB = 1 GBA 4GB USB key holds 4 000 000 000 bytes
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Binary Transfer
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Input Devices Allow User Interaction with the Computer
System Convert Signals to Binary Form Send Data to the CPU for Processing Support Various Interfaces
Parallel Serial USB Firewire
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Examples of Input Devices
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Examples of Output Devices
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Storage A storage device is any device into which data
can be entered and held, and from which data can be retrieved at a later time
Some storage devices are part of the computer itself
Other storage devices are peripherals There are two main categories of storage device:
Permanent storage Temporary storage
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Examples of Permanent Storage Devices
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Temporary Storage Used by the CPU to Process Data
and Instructions
Provided by: RAM (random access memory) Cache Memory
• Internal cache (part of the CPU)• External cache (part of the motherboard)
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The CPU (Central Processing Unit)
The CPU is the “Brain” of the computer The CPU is responsible for most
information processing Most CPU’s produce a lot of heat, and
are cooled by fans, heat-sinks, and sometimes liquid.
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File Management
The term computer file managementrefers to the manipulation of documents and data in files on a computer.
Specifically, one may create a new file or edit an existing file and save it; open or load a pre-existing file into memory; or close a file without saving it.
Additionally, one may group related files in directories or folders.