What They Are

• Fundamental concepts, terms, images by which and through which info is easily recognized, understood, remembered.

• in language metaphor adds color and meaning

• she attacked the problem from many angles

• he built him up and then knocked him down
   

• We communicate command and control options in a device

• you can see how to steer this because this thing here must be a steering wheel
   

• We communicate status of data and functions

• buzzer or red light or rising tone as critical region is approached

• hour glass fills up to tell us process is almost done

• guages, pie charts, etc to indicate degrees of ...