Companies are again searching for ways to improve their processing power without further investment in new hardware and software. Many client computers are idle most of the time, and have unused disk space. The next logical step is to maximise the use of these computers. The peer-to-peer (P2P) model is the answer. A new and simple peer-to-peer model will be introduced in this book, which will teach readers to install peer-to-peer systems in which users can share their computing power. The target readers are those who have basic Java knowledge and are interested in building (or testing the performance of) peer-to-peer systems.