Physical ergonomics

medical condition due to compression of the median nerve as it travels through the wrist at the carpal tunnel

injury to the musculoskeletal and nervous systems that may be caused by repetitive tasks, forceful exertions, vibrations, mechanical compression, or sustained or awkward positions

computer keyboard designed for good ergonomics

series of ergonomic keyboards from Microsoft

computer input device where the user enters characters or commands by pressing several keys together (like a piano chord); requires only one hand

thumb|Velotype keyboard