| Oct 94 | Reference Manual published: | 
| International Journal of Supercomputing Applications, 8 (3/4), 1994 | |
| Apr 95 | Start of meetings for MPI-2 | 
| Apr 97 | MPI-2 document accepted | 
| Feature | HP-MPI | MPICH | LAM | 
|---|---|---|---|
| Process Creation and Management | + | ||
| One-sided Communication | ++ | ||
| Extended Collective Operations | |||
| External Interfaces | + | ||
| I/O | ++ | ++ | |
| Language Bindings | ++ | ||
| Miscellany | + | 
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