A chatbot that actually solves your problem, a factory robot that calls for its own maintenance before it breaks down, and a tractor that harvests an entire field by itself — these are not scenes from a sci-fi movie. They are real systems running today, built on the AI foundations we have explored. This chapter takes that knowledge into the world of business, showing how AI is put to work in real companies and how smart machines are reshaping everything from accounting firms to operating rooms.