The 1^st Tutorial on Broad Band Dielectric Spectroscopy and its Applications was held in Lille , France on 10^th and 11^th of July 2005 in the framework of 5^th International Discussion Meeting on Relaxations in Complex systems. Over 50 registered participants from 15 countries attended this Tutorial. The lecturers on dielectric spectroscopy, the theory of dielectrics, data treatment and the use of dielectric spectroscopy in different fields of science and engineering were given by Graham Williams, Jeppe Dyre, Friedrich Kremer, Ranko Richert, Yuri Feldman, Bernhard Rolling and Hywel Morgan. The organizers of the first Tutorial on Broad Band Dielectric Spectroscopy made a concerted effort to gather experts who utilizing Dielectric Spectroscopy in condensed matter physics, polymer science, colloid chemistry, glass science and biophysics to share the fundamental concepts in their specific field with others. Through the exchange of ideas in the discussions after each lecture the participants had the opportunity to discuss the critical issues and confront each other in a congenial manner on their often-divergent views and opinions on these issues, thus enhancing the knowledge of dielectric phenomena in complex systems. Both the participants and the lecturers expressed interest in the continuation of such tutorials.

It is a pleasure to acknowledge the contribution of all those who were involved in the planning and organization of the Tutorial. We are greatly indebted to Dr. Kia Ngai and the organizing committee of 5^th International Discussion Meeting on Relaxations in Complex Systems for making time available during their meeting session for this tutorial session. We also grateful to Dr. Laurent Carpentier for his time and efforts in technical support of the tutorial and his personal touch and special care he gave to all the participants.

John Berberian
Yuri Feldman
Friedrich Kremer
Ranko Richert