PGAS - Partitioned Global Address Space assumes a global memory address space that is logically partitioned and a portion of it is local to each process, thread, or processing element. This can facilitate the development of productive programming languages that can reduce the time to solution, i.e. both development time and execution time. Languages based on PGAS are Unified Parallel C, Co-Array Fortran, Titanium, X-10, Chapel and others.