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Hierarchically-Relayed Grid , a general purpose grid engine for research and education, specifically for scientific computing. it"s used like P2P network for end user. Hierarchically-Relayed Protocol(HRP) included. Features: * It"s semi-centred, two HR grid can be merged to one, the grid is dynamic * It"s distributed, designed for internet through TCP, now you can send data to any body that joined to the grid, even if it hidden behind a firewall * It"s simple and small, just a network infrastructure of grid, unlike the LARGE projects such as globus and ICE(The Internet Communications Engine) * It"s mixing C C++ and Python, core code written by C++, has both C and Python interface * It"s cross-platform, mainly Windows, also Linux, and embedded-linux ready HRG can be used for: * Distributed and gr