This book constitutes the refereed proceedings of the Third International Conference on Grid ad Cooperative Computing, GCC 2004, held in Wuhan, China in October 2004.

The 96 revised full papers and 62 revised short papers presented together with abstracts of 7 invited contributions were carefully reviewed and selected from a total of 427 papers submitted for the GCC 2004 main conference. The papers are organized in topical sections on grid services and Web services, grid middleware and toolkits, advanced resource reservation and scheduling, grid security, information grid and knowledge grid, p2p computing and automatic computing, and innovative grid applications