The cobalt is a less known metal, has applications in alloys for aeronautical or military uses, in cutting tools, in paints, in magnets, in compact disks, in video and audio tapes, in hybrid cars batteries, phones and laptops batteries and for pacemakers. All cars, trucks, almost all automotive vehicle has their cobalt content. It is clear that any man or woman in decades is larger consumer of cobalt.Currently, almost of 20% of world cobalt production so nearly 10,000 tonnes and 60% of world production of cobalt-based super alloys are recovered by the US who view the metal as highly strategic to the extent that its deficiency could seriously impact its economy, industrial and military power as well as many highly industrialized countries.In this book, we can find information about cobalt sources, cobalt process, cobalt recycling and its applications described by nearly 80 flow-sheets, sketches and graphs.This book is a compendium, a mine of information, experiences and relevant industry practices, a must have, a book to learn about one of the most influential strategic metal impacting the global economic scene.Roger RUMBU, Met. Eng. - University of Lubumbashi, PPM Certificate - University of Pretoria