Assertion: computer keyboard | /r/MadeOf | alphanumeric or character keys
Facets:
value: for typing
type: PURPOSE
Source sentences:
text: A computer keyboard consists of alphanumeric or character keys for typing, modifier keys for altering the functions of other keys, navigation keys for moving the text cursor on the screen, function keys and system command keys – such as Esc and Break – for special actions, and often a numeric keypad to facilitate calculations.