1.1.3 Input, output and storage

input device is any device that allows you to pass information from the real world into the computer ex: mouse, webcam output device is any device that takes data stored in digital form and converts it into other formats that humans can process ex : sound, vibrations storage device is any device used for temporary or permanent stooge of data either external or internal Ex: ram , sdd , usb stick

magnetic, flash and optical storage devices. drives are the device that r/w data secondary storage media what the data is stored on

harddrives ferrous partials on disk are polarised to become either south or north state representing 0’s and 1’s pos ) cheap, large capacity neg ) slow access time , fragile

solid state drives , memory cards , memory stick flow of electricity pushes through electrons into floating gate between two oxide layers, change in charge is 0 or 1 pos ) durable , portable (memory card) , fast access time neg ) cost , limited r/w (oxide layers deteriate transfer of electrons becomes unreliable)

cd r/w , dvd r/w , blue ray has pits and land representing 0’s and 1’s reflective and non reflective are read as 1’s and 0’s rewriteable need laser and magnet to change pos ) cheap, lightweight, portable neg ) slow access time, scratches

special components that processes data and instructions to control other components with a computer. Example cpu and gpu

memory witch computer can store data or instructions that are currently being used

memory witch computer can store data or instructions that are not currently being used

a computer system built into another device to support its operations

capable of preforming many different tasks