DMK press, 2009, 144 pages. The second book by the famous French engineer Patrick Guelle, dedicated to chip cards, allows the reader to study in more depth the principles of operation and the possibilities of using the most modern chip cards in amateur radio practice - with a microprocessor and rewritable, which are described in the first book. On the other hand, this is a completely self-sufficient publication, which examines in detail chip cards with microprocessors, as well as the tools and software packages necessary to work with them. The presented designs are distinguished by their simplicity, low cost and manufacturability. For all devices, printed circuit board drawings are provided and the operating principles of the circuits are described in detail.