Human-computer interface

Computer-human interaction is when a computer system and a human share information with each other that affects each other's behavior.

Human background

Touch is primary, and vision is secondary in learning about the world. A human first learns about the world through touch, then in later stages, learns through vision.

Doug Engelbart’s mouse makes use of this importance of touch, in that the mouse is a held and felt object, compared to a light pen, which always feels floaty.