Checklist for Keys

No significant benefits Minor benefits Major benefits
No significant benefits Minor benefits Major benefits

A recognised layout of keys is used
The '5' key is marked tactually
The keys are well spaced
The keys have concave tops
A legible typeface has been used to mark the keys
The keys are tactually discriminable by shape
The keys are colour coded according to the relevant standard
There is tactual feedback on key press
There is auditory feedback on key press
The system can be used comfortably by someone who is left-handed
The keypad can be reached and used by someone in a wheelchair
The keys are internally illuminated when active