Normally 4 Parts are there in a keyboard Alphanumeric keypadNumeric keypadSpecial keysControl keys / Move Keys
the four types of keys on a computer keyboard are the function keys,typing keys,editing keypad and the numeric keypad
Search up a list of alt keypad commands on Google.
How are they different from keyboards?.
A computer that uses the keyboard, instead of touch. Touch screen computers enable you to just touch the screen and open files that way, without a keyboard or mouse.