“Each placement of an object, the choice of materials, the addition of hooks, handles, knobs, and switches, is both for utility and for communication. The physical placement and the perceptual appearance, sound, and touch all talk to the users, suggesting actions to be taken. Sometimes this conversation is accidental, but in the hands of good designers, the communication is intentional. Design is a conversation between designer and user, one that can go both ways, even though the designer is no longer present once the user enters the scene.” (Donald Norman) courtesy of ui designer