*This research was supported in part by the National Science Foundation under grants IST-81-20685 and IST-85-12419 and by the Naval Ocean Systems Center under contracts N00123-81-C-1078 and N6600183-C-0255. ‘Experimental evidence indicates that either interpretation is equally likely when this text is presented to human subjects (Granger & Holbrook, 1983). happy, how does the understander resol...

As information systems become more complex and present an increasingly rich amount of information to users, interruptions present an ever larger hurdle to operational efficiency. User interface technologies intended to support increased user-control of the transitions between computer-based tasks can help mitigate that obstacle. We present a three-pronged approach that combines dynamic interrup...

It is common for organisations to introduce substantial changes to their structure and operations in order to adapt to new business environments. This often confers legacy status on their software systems because they can’t adequately support the new business processes. In this paper, we argue that it is necessary to recover the requirements of in-service legacy software to ensure that its evol...