Preface.

For over 20 years, academic and industry researchers have focused on the ease of use (or usability) of computer systems. This field, also known as human-computer interaction and human factors engineering, has evolved and grown from humble beginnings to the point where its significance is widely appreciated in the world of information technology, and its role has become critical in a highly competitive business marketplace.

IBM has been one of the leaders in the development of this field from its inception. IBM's User-Centered Design (UCD) approach began as a small pilot project and developed into a company-wide fundamental element in the design process for all IBM product offerings under the guidance of Lou Gerstner. UCD has become an …