Cyclotrons and their applications : proceedings of the 15th international conference, Caen, France, 14-19 June 1998

Commemorative talk in memory of J.R. Richardson uses - present and perspectives systems and technology newly operating cyclotrons radioactive ion beam facilities high intensity beams sources, injectors and boosters beam dynamics and related computational tools control system and operator - user interface operational cyclotrons - developments and status prospects and proposals facilities under construction final remarks.