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The Worldwide LHC Computing Grid (WLCG) is a global computing infrastructure whose mission is to provide computing resources to store, distribute and analyse the data generated by the Large Hadron Collider (LHC), making the data equally available to all partners, regardless of their physical location.

WLCG is the world's largest computing grid. It is supported by many associated national and international grids across the world, such as European Grid Initiative (Europe-based) and Open Science Grid (US-based), as well as many other regional grids.

WLCG is co-ordinated by CERN. It is managed and operated by a worldwide collaboration between the experiments (ALICE, ATLAS, CMS and LHCb) and the participating computer centres. It is reviewed by a board of delegates from partner country funding agencies, and scientifically reviewed by the LHC Experiments Committee.