Human-computer interface

A human-computer interface is technology that sits between a human and an internal processor in a computing device. It consists of the input and output devices between the human and the computer, like displays, controllers, and pointing devices.

It involves computer-human interaction, which 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.