The world of coffee.
The professional espresso machine.
The world of coffee and its preparation in a professional way is so broad that it deserves a separate course as there are several. To become a specialist in this branch anyway, the courses should be followed live and completed with a lot of practice and tests in the workplace if you already have it. The professional bartender must be self-sufficient in all the various sectors. He must know how to do everything and possibly well. I will limit myself in these pages to expose basic notions to which those interested in learning will add personal studies and practice according to their aptitudes.