PRINCIPLES OF USER INTERFACE DESIGN

• An interface must really be just an extension of a person. This means that the system 

and its software must reflect a person's capabilities and respond to his or her specific

needs.

• It should be useful, accomplishing some business objectives faster and more 

efficiently than the previously used method or tool did.

• It must also be easy to learn, for people want to do, not learn to do.

• Finally, the system must be easy and fun to use, evoking a sense of pleasure and 

accomplishment not tedium and frustration.

• The interface itself should serve as both a connector and a separator

• a connector in that it ties the user to the power of the computer, and a separator in that 

it minimizes the possibility of the participants damaging one another.