Input and output devices almost dont exist anymore but they co-exist together. If you looked at a traditional computer, you would notice the different components easily. Input devices include any device that is used to put information into the CPU (or central processing unit). These devices include the keyboard, the mouse, and any webcam or scanner. Output devices are those that put
. information out of the CPU, also known as your printer or monitor. You can find this and many more information on input and output at http://cil.usu.edu/htm/cs/iodevices/.