“As information technology devices and applications grow in number and importance, the significance of ease of use in their design grows apace. In this issue, twelve papers focus on aspects of design for ease of use as applied to the entire design process, from understanding user requirements to conceptual design, prototyping, field testing, and redesigning. The history and future of User-Centered Design (UCD) and User Engineering (UE) are discussed, and case studies illustrating the role of UCD and UE in many fields are presented. Topics include the design of wireless devices, on-screen documentation, and database management and data visualization systems.” (IBM Systems Journal)