Every profession develops a set of cognitive tools and a culture that envelops its activities, artifacts, knowledge, and practice. "Interfaces.com: Cognitive Tools for Product Designers" offers readers an introduction to the product design conceptual framework: what goes into creation of a successful product design? Individual differences in personality types and learning styles, memory limitations, perception, background and social knowledge, cultural differences, reasoning styles, categorization strategies, and attention controls are examined as usability variables for developing products that work for specific audiences.