https://padlet.com/1161204089/c9nqyu3zk8x2 chapter 3 input and output device en-us 2017-05-07 05:46:06 UTC 2024-08-23 04:51:02 UTC hello@padlet.com 1161204089 https://padlet.com/1161204089/c9nqyu3zk8x2/wish/170340926 input and output device]]> 2017-05-07 05:58:29 UTC https://padlet.com/1161204089/c9nqyu3zk8x2/wish/170340926