The usage of computer keyboards can cause repetitive strain injury which is impossible to treat later. Ergonomic keyboards and keyboard layouts like Dvorak are recommended for the use by touch...
It is shaped in a way that makes it easy on the hands and wrists.
Keyboards that are suppose to be much easier on the hands. They help with carpel tunnel problems. I have used one of these boards...
Qwerty made sense for the mechanical typewriters, by placing most frequently used letters spaced apart. These days we'd be better of having the most frequently used letters clumped together.