computer systems

computer systems

1. output

   • printer - that excepts data from a computer and prints it onto paper and it can be things like text and photos
   • Monitor - displays the output as images on the screen and this means text and the general display too
   • Speakers - converts the file into sound
   • LED - lights when there is an output

2. input

   • keyboard - allows the user to enter data by pressing keys
   • mouse - allows the user to click icons using the movement of the object and the buttons
   • Microphone - picks up the sound created and converts it into digital input data
   • Heat sensor - detects the surrounding temperature and inputs the data
   • Touch screen - detects the fingers movement and inputs the data for the computer to use

3. storage

   • software
   • Optical
     • DVD - follows the same system of retrieving the data as a cd but can store more data so is normally used to store films
     • Blu Ray - functions the same as a DVD and CD but the dots are much closer together so it can store more data the resolution of the image is much better and uses a blue ray
     • CD - it has dots and depressions on the surface that are read as either a 0 or a 1 by a red laser. It has a small capacity so is normally used to store smaller files like music files
   • Solid state
     • memory stick - you are able to save or copy files onto the memory stick
     • SD Card - rows of small memory chips work together to store data
   • Magnetic
     • Magnetic Tape - can be used for backing up servers due to the high capacity, durability and fairly low cost per GB
     • Magnetic disc - stores and retrieves data using disks with magnetic spots that a needle picks up

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