The Classe des Sciences of the Academie royale de Belgique wished to have a spreading tool to up to its needs and requirements. Was immediately imposed the idea of an electronic journal, which could make available the text of all papers at meetings or other items, and provide various current information. A committee was established consisting of members and associates of the Class: Mrs Claude Tomberg, President, Mr Jean-Marie André, Mr Marc Boutry, Mrs Simone Gutt, Mrs Marcelle Kaufman and M. Francis Robaszynski. The on-line in October 2011 embodies this long-term project. The Bulletin is still at its start. It is destined for growing rapidly and for gradually improving to come up for the best to the Internet user’s expectations. Good reading!