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PVM enables users to exploit their existing computer hardware to solve much larger problems at less additional cost. PVM has been used as an educational tool to teach [[parallel programming]] but has also been used to solve important practical problems.<ref name=PvmHome/> It was developed by the [[University of Tennessee]], [[Oak Ridge National Laboratory]] and [[Emory University]]. The first version was written at ORNL in 1989, and after being rewritten by University of Tennessee, version 2 was released in March 1991. Version 3 was released in March 1993, and supported [[fault tolerance]] and better [[portability (computer science)|portability]].
PVM continues{{when|date=March 2011}} to be actively developed, although its relative maturity and stability mean that new releases are infrequent. It was a step towards modern trends in [[distributed processing]] and [[grid computing]]. It is still widely used{{fact|date=October 2011}}, and new bindings (for example the Perl <code>Parallel::PVM</code> module) are under active development. PVM is [[free software]], released under both the [[BSD License]] and the [[GNU General Public License]]. The Perl interface to PVM is released under the [[Artistic License]].<ref>{{cite web
|url=http://search.cpan.org/src/DLECONTE/Parallel-Pvm-1.4.0/README
|title=Perl PVM README
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