Any device designed to transport Information generated or stored withing a Computer (or some information processing system) to a system outside the computer. By virtue of being able to store information, this external "receiver" is an information processing system (even if a trivial one). The whole process is an instance of Communication.

Commonly, the receiver system are Humans, so that the information is transformed into "human-readable form" for this transmission, by manifesting the information into physical forms that excite the Senses in the appropriate ways.

• Display devices use Light fields to excite Vision
• Sound devices use Sound fields to excite Hearing
• Haptic devices use physical contact to excite Touch

etc