The Principle of Least Astonishment
http://www-106.ibm.com/developerworks/usability/library/us-cranky10.html

Seebach, Peter
IBM
2001

Abstract:

When computers are at their most usable, we don't even notice them; when they are at their least, they astonish us. Here, Peter explores the Principle of Least Astonishment, and how it can help you develop better interfaces.