1. Barkhuus, L. and Dey, A. Is context aware computing taking control away from the user? Three levels of interactivity examined. Proceedings of the Fifth Annual Conference on Ubiquitous Computing (UBICOMP 2003), [online],http://www.intel-research.net/Publica-tions/Berkeley/072120031254_134.pdf, accessed 23 September 2005.