The CHIMP project is based at the Edinburgh Parallel Computing Centre . Like LAM, CHIMP started off as an independent portable message passing infrastructure and was later adapted to implement MPI. CHIMP is best known as the basis for the vendor-supplied optimized versions of MPI for the Cray T3D and T3E. Chimp is portable, running on many platforms including Solaris, Irix, AIX, OSF/1, and Meiko. To the best of this reviewer's knowledge, CHIMP is not in active development and is not widely used, at least in the U.S.