Users do not care about what is inside the box, as long as the box does what they need done.

An interface is humane if it is responsive to human needs and considerate of human frailties.

When you have to choose among methods, your locus of attention is drawn from the task and temporarily becomes the decision itself.

A computer shall not harm your work or, through inaction, allow your work to come to harm.

Once the product's task is known, design the interface first; then implement to the interface design.

Users do not care about what is inside the box, as long as the box does what they need done.

A computer shall not waste your time or require you to do more work than is strictly necessary.