Cet article date du temps où Jean-Raymond Abrial habitait rue des plantes à Paris. Digilog était deveni Steria, mais pas encore Clearsy. Donc d'avant 2001. On B Jean-Raymond Abrial Consultant, 26, rue des Plantes, 75014, Paris. abrial@steria.fr In the B-Book [Abr96], an introduction entitled “What is B ?” presents it in a few pages. There is no point in reproducing this introduction here. There is, however, clearly a need to have in this book a sort of informal presentation of B complementing that of the B-Book for those readers who are not familiar with this approach. This is the purpose of this short text, where the emphasis will be put on the question of the development process with B. At the end of the text, I will also cover some more general problems concerning B (tool, education, research, future). B is o “Debugger”. The aim of B is very practical. Its ambition is to provide to industr...
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