Because computers have memories, we imagine that they must be something like our human memories, but that is simply not true. Computer memories work in a manner alien to human memories. My memory lets me recognize the faces of my friends, whereas my own computer never even recognizes me. My computer's memory stores a million phone numbers with perfect accuracy, but I have to stop and think to recall my own.
Alan CooperUsability methods are like sandpapering a chair. If you are making a chair, the sandpaper can make it smoother. But no amount of sandpaper will turn a chair into a table.
Alan Cooper