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Computer Hardware
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
Functions of Hardware
Inside a Computer
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
Binary Transfer
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
Examples of Input Devices
Examples of Output Devices
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
Examples of Permanent Storage Devices
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)
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.
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.