| System | Comments |
|---|---|
| Cray T3D | This is the official Cray/EPCC version. This installation does not have a complete MPI implementation; the tests involving MPI_Rsend and persistent sends failed. Logs are not available (MPE could not be built due to bugs in /bin/sh and/or /bin/sed). |
| IBM SPx | This is MPICH running on Argonne's IBM SP (SP1 nodes with SP2 switch) |
| IBM SP2 | This is the official IBM version. |
| SGI Power Challenge | This is the official SGI version, running on a single multiprocessor system. |