This book offers an economic approach to the industry and provides the reader with the necessary tools to understand the foundations of market structures.It provides students with a clear and complete reference framework, which presents both the essential knowledge to be acquired and the indispensable methodological contributionsThe objective of this book is to provide real tools for work and training in industrial economics. Each chapter includes a "course" part and an "applications" part with answers: MCQs, exercises and reflection questions.As such, this book is very useful for university and college students in telecommunications, computer science, mathematics, management and economics. They will be able to situate themselves and understand the teachings given and thus have an autonomous and complementary activity to the tutorials. It will allow them to prepare well for competitions and exams while developing their critical sense.