As a rich documentation of social and environmental impacts of computers during their utilisation already exists, the present work mainly deals with the question of how the technical life of a computer can be extended. Additionally the resulting environmental and economical benefits are being assessed. Different life cycle extension methods are critically reviewed and, subsequently, the acceptance of end-users regarding the use of computer systems, whose life cycle is prolonged, is evaluated. Furthermore, the economic impact on businesses using such computer systems is also measured. Two...