'I welcome any technological advance that reduces my need for mental work but still gives me the control and enjoyment of the task. That way I can exert my mental efforts on the core of the task, the thing to be remembered, the purpose of the arithmetic or the music. I want to use my mental powers for the important things, not fritter them away on the mechanics.'

p.193

'In making things visible, it is important to make the correct things visible. Otherwise people form explanationsfor the things they can see, explanations that are likely to be false.

p.198

'Get the Mappings right

-Between intentions and possible actions

-Between actions and their effects on the system

-Between actual system state and what is perceivable by sight, sound or fell

-Between the perceived system state and the needs, intentions, and expectiations of the user

Natural mappings are the basis of what has been called "response compatibility" within the fields of human factors and ergonomics.'

p.199

The design of everyday things, Donald A. Norman