For your information, Priya Jain wrote about Grid Computing in tech primer section of Express Computer.

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A grid is a group of computers, servers and storage, which is virtualised as one large computing system across an enterprise. Grids unleash latent power that is not being used at any point in time. They can radically accelerate compute-intensive processes. Grid computing involves applying the resources of many computers in a network to a single problem at the same time—usually a scientific or technical problem that requires a large number of computer-processing cycles or access to huge amounts of data. Grid computing uses software to divide and farm out pieces of a program to as many as several thousand computers. A number of corporations, professional groups and university consortia have developed frameworks and software for managing grid computing projects.
Grid Computing - Express Computer