INPUT AND OUTPUT DEVICES.

BASIC iNPUT AND OUTPUT DEVICES. Reading AND TEST.
https://www.bbc.co.uk/bitesize/guides/zqg9q6f/revision/1


http://www.abcya.com/input_output.htm




https://www.computerhope.com/issues/ch001355.htm




https://www.bbc.co.uk/education/guides/zxgkxnb/test 


https://en.wikiversity.org/wiki/Information_Systems/Peripherals