Ergonomics for computerists: two and a half analogies.
Imagine an analog radio.
Out of tune, there’s noise.
In tune, there’s music.
Out of tune, noise reveals radio.
In tune, music conceals radio.
Out of tune, noise wastes energy – annoyance.
In tune, music propels energy – swinging.
Imagine shoes.
Out of fit, pain reveals shoes.
In fit, fitting conceals shoes.
Out of fit, pain wastes energy – bruising.
In fit, fitting propels energy – running.
Imagine a computer.