Drag each item to the appropriate bin. if the item is not an input to or an output from the light reactions, drag it to the "not input or output" bin.

In computer systems, there are two types of devices: the input devices and the output devices. The input devices sends data or information to the computer system for processing while the output devices display or reproduce the result of the processing. A device can either be both which is called I/O device.

Best examples for input devices are the mouse and the keyboard. Examples of output are the computer monitors, speakers, and projectors. For I/O device, a USB flash drive is a best example.