Building Usable Websites, Part 1
http://www.waterandstone.com/cms-articles/usability,-part-1.html

Shreves, Ric
Water and Stone
2004

Abstract:

Usability is all about how people interact with software driven systems and how to make those systems better suited to their all-too-human users. When you hear people describe a piece of software as “user-friendly” or “intuitive”, what they are really saying is that the software exhibits good usability.