Current Computer games are largely single-user and have reasonable graphics
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MOO is Multi-User but no graphics
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SIMNET and its successor DSI(Distributed Simulation Internet) is an example where large scale multi-user simulation is linked to real hardware and real people making decisions
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One has both real and simulated war vehicles
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Implemented as a world-wide simulation
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This requires complex event driven simulations which are some of hardest parallel applications
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SIMNET worked as components interacted very loosely and so one could broadcast envbironment changes to individual simulation computers
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This will become the commercial multi-user games where for instance all F16 game owners dial a central site and fight it out in the same simulated 3D world
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