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http://www.stcsig.org/usability/newsletter/0104-instructions.html

Dick, David J.
Usability Interface

Abstract:

My father taught me valuable lessons that I will never forget. He taught me how to maintain the family car, how to fix household appliances, and how to use garden equipment. Although would show me how to perform the task, he would stress that I read the instructions. His philosophy was based on the belief that instructions are written to teach and to prevent mistakes. What does this have to do with usability?