1. TOP 500 Project: Top 500 Supercomputer Sites, http://www.top500.org
2. Sandia National Laboratories: Thunderbird Linux Cluster, http://www.cs.sandia.gov/platforms/Thunderbird.html
3. Message Passing Interface Forum: MPI: A Message-Passing Interface Standard (1994)
4. Network-Based Computing Laboratory: MVAPICH: MPI-1 over InfiniBand, http://mvapich.cse.ohio-state.edu/overview/mvapich
5. Argonne National Laboratory: MPICH2 : High-performance and Widely Portable MPI, http://www.mcs.anl.gov/research/projects/mpich2/