Grid computing is a form of distributed computing whereby resources of many computers in a network is used at the same time, to solve a single problem. What distinguishes grid computing from conventional cluster computing systems is that grids tend to be more loosely coupled, heterogeneous, and geographically dispersed.
Grid computing is making big contributions to scientific research, helping scientists around the world to analyze and store massive amounts of data. Research time is reduced from years to months because the work is split into small pieces that can be processed simultaneously. The technology is also more cost-effective, enabling better use of critical funds.