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Grid computing has recently migrated from traditional high performance and distributed computing to pervasive and utility computing based on the advanced capabilities of the wireless networks and the lightweight, thin devices. This has as result the emergence of a new computing paradigm which is the Mobile Grid. This paper provides a discussion on Mobile Grid definition, the basic motivation and benefits that can stem from this new technology, especially as far as it concerns collaborative engineering, industry and the everyday life of the “mobile” citizen. In the sequel it presents a set of major technical topics that influence the traditionally basic Grid Infrastructure services under the new Grid environment involving Mobile Grids.