Message passing is a paradigm used widely on certain classes of parallel computers.
LAM is designed for heterogeneous computers on a network. With LAM, a dedicated cluster or an existing network computing infrastructure can act as one parallel computer solving one problem. LAM features extensive debugging support in the application development cycle and peak performance for production applications. LAM features a full implementation of the MPI communication standard. XMPI is an accessory for MPI implementations that can be used for debugging and visualization of MPI programs.