It has been found that some people sustain physical discomfort after prolonged use of a computer. Hands, wrists, arms, shoulders, and necks are particularly vulnerable to strain and possibly damage from extensive computer use.
Computer users should try to take period breaks from their work to minimize this strain. They can also consider input devices designed to reduce strain and fatigue.
Click on the thumbnail pictures here to view an assortment of devices that have been designed to improve the human-computer interface world.