Mainframe processing is fast becoming a barrier in information systems, but client / server models shift the processing burden to the client computer. Through the work load, clients share / server systems can improve overall efficiency while reducing the budget. The company is again looking for ways to increase their processing power without further investment in new hardware and software. ? ? The software needed to implement peer-to-peer quickly can be downloaded from the site in www.springer.com/1-84628-381-7/ book? The spread of web technologies will enable individuals and organizations of all sizes to use computers in the network as if it were a single supercomputer to solve complex problems, and after reading this book, readers will be able to install a system of peer-to-peer network of any size.