On June 20-23, 2007 the International Society for Computer Assisted Orthopaedic Surgery (CAOS-International)will meet in Heidelberg, Germany for their 7 th Annual Meeting. In past years, these conferences have established themselves as the premier scienti ?c events in the agendas of physicians, researchers, developers, and system providers who are interested in all aspects of CAOS technology – its development as well as its clinical application and evaluation. For additional information on CAOS-International as well as the past and future annual meetings, please visit the society ’s homepage at http://www.CAOS-International.org/.