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Ian Foster, Designing and Building Parallel Programs, http://www-unix.mcs.anl.gov/dbpp/ | 
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The Amoeba Distributed Operating System, http://www.cs.vu.nl/pub/amoeba/ | 
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The Message Passing Interface (MPI) standard, http://www-unix.mcs.anl.gov/mpi | 
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PVM: Parallel Virtual Machine, http://www.epm.ornl.gov/pvm/ | 
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Beowulf Project at CESDIS, http://www.beowulf.org/ | 
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AVALON, http://cnls.lanl.gov/avalon/ | 
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SETI@home, The Search for Extraterrestrial Intelligence, http://setiathome.ssl.berkeley.edu/ |