Thursday, April 9, 2015

Computer Architecture

Some things in a computer are input devices and some are output device, and some can be both.

Some examples of input devices are cameras, trackpads, microphones, a mouse, and keyboards. These are things that you put some sort of input into.

Some examples of output devices are the screen, printers, projectors, and speakers. These things give something out based on your input.

Some examples of devices that can both input and output are touch screens, USBs, fax, and headsets.


In the middle, there is the process, which turns the input into an output. It is also called the central unit. In one part of it, there is the CPU, or Central Processing Unit. In the CPU, there are: The Control unit, which controls in what order the components of your program should be followed; and the ALU or Arithmetic Logic Unit, which performs arithmetic operations and evaluates logical expressions. There is also the RAM or Random Access Memory, which is a volatile memory that only contains what the user is using at the moment. It gets whatever you are using from the hard drive. This memory will be wiped clean. Inside the RAM are whatever programs you are using and whatever data you need.

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