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This article presents the P-RIO environment, which offers high-level, but straightforward, concepts for parallel and distributed programming. A simple object-based software-construction methodology facilitates modularity and code reuse. This methodology promotes a clear separation of the individual sequential computation components from the interconnection structure used for their interaction. P-RIO provides immediate mapping of concepts associated with the software-construction methodology to their graphical representations. P-RIO offers a graphical programming tool, modular construction, high portability, and runtime support mechanisms for parallel programs, in architectures composed of heterogeneous computing nodes.

J. Leite, E. V. Carrera E. and O. Loques, "P-RIO: A Modular Parallel-Programming Environment," in IEEE Concurrency (out of print), vol. 6, no. , pp. 47-57, 1998.
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