Thanks to creative minds that build assistive technology devices, physically challenged people do not have to give up computing. Computers work by accepting input from people and providing output ...

Input devices like keyboards, touchscreens, webcams and game controllers are designed and built to digitise the information they receive before sending it to the computer CPU for processing.

Output devices include speakers, monitors and printers. This explanation includes how input devices are converted into binary code, and how wireless devices like tablets have both inputs and outputs.

In prior Java 101 articles, I referred to the concepts of redirection, standard input device, and standard output device. To demonstrate inputting data, several examples called System.in.read() .