The Essential Guide to User Interface Design
An EPSS Interface that people can use
The Importance of Designing Usable Systems
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According to this article by Susan Dray; "Developers often see the functionality of a system as separate from the UI, with the UI as an add-on. Users, however, do not typically make distinctions between the underlying functionality and the way it is presented in the UI. To users, the UI is the system. Therefore, if the UI is usable, they will see the entire system as usable." (1999-08-22)
The link address is: http://www.dray.com/articles/usablesystems.html
