As life expectancy increases in the affluent Western World, older workers and the retired form a large and growing proportion of the world's population. Professionals working to develop systems and environments need to better accommodate the user needs of the older adult. adult. It considers the subject primarily from an engineering-psychology perspective, heavily grounded in scientific knowledge. It shows how the understanding of age-related issues of perception, cognition and movement control can be applied in practice, and provides a reference source with guidelines and advice for design issues ranging from lighting, computer input device selection and web design, to training programme development and work task design. It draws on research-orientated work and presents this in a form which can be used by the broad audience of product designers, healthcare practitioners, managers and others who need answers to the problems and require sound recommendations for design.