MPICH
free open-source software
MPICH, formerly known as MPICH2, is a freely available, portable implementation of MPI, a standard for message-passing for distributed-memory applications used in parallel computing. MPICH is Free and open source software with some public domain components that were developed by a US governmental organisation, and is available for most flavours of Unix-like OS (including Linux and Mac OS X).
History
MPICH development began in 1992, when a standard for message passing in parallel and distributed computing was still being discussed. MPICH tracked the development of the MPI standard as it evolved. This served dual purpose: to prove that the MPI standard could be implemented as defined, and that it could be done efficiently on all major platforms.
Argonne National Laboratory and Mississippi State University jointly developed early versions (MPICH1) as public domain software. The CH part of the name was derived from "Chameleon", which was a portable parallel programming library developed by William Gropp, one of the founders of MPICH.
In 2001, work began on a new code base to replace the MPICH1 code and support the MPI-2 standard. Until November 2012, this project was known as "MPICH2". As of November 2012, the MPICH2 project renamed itself to simply "MPICH". MPICH v3.0 implements the MPI-3.0 standard.
“MPICH” enters the record as free open-source software. Crown Archives preserves that source wording while asking what MPICH, free and open-source can confirm, complicate or overturn.
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The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Feb 10, 2026. The linked authority identifier is Q1814051. 2 of 2 selected statements include explicit references; 1 carry qualifiers and 1 use preferred rank. The first chronological checks are 1992, 2001 and 2012.
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This entry incorporates text from “MPICH” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.