Tripoli-4 ® is available on 64 bits Linux, as well as on some proprietary UNIX (IBM, HP), and on massively parallel machines. The standard mode of Tripoli-4 ® is mono-processor. Moreover, Tripoli-4 ® has its own implementation of parallel operations [25]. This mode does not rely on a dedicated third-party library. It is based on a proprietary, built-in, communication library. It uses BSD sockets under the GNU C library Lesser General Public License, and can access any CPU on the network without the need of MPI or OpenMP. It may run on single multi-core machines as well as on heterogeneous networks of stations or massively parallel machines.