Slide Image: A three-dimensional diagram with three axes (arrows) pointing up (labeled "Capabilities" – Low to High), pointing to the right (labeled "Ways of Thinking and Acting" – Poorly Developed to Highly Developed ) and pointing to the lower left (labeled "Knowledge" – Limited to Extensive).

Credit: Reprinted with permission from Technically Speaking, © 2002 by the National Academy of Sciences, courtesy of National Academies Press