This IBM Redbooks publication is one in a series of IBM publications written specifically for the IBM System Blue Gene Solution, Blue Gene/L, which was developed by IBM in collaboration with Lawrence Livermore National Laboratory (LLNL). It provides an overview of the application development environment for Blue Gene/L. This book explains the instances where Blue Gene/L is unique in its programming environment. It does not delve into great depth about the technologies that are commonly used in the supercomputing industry, such as Message Passing Interface (MPI) and Aggregate Remote Memory Copy Interface (ARMCI). References are provided in those instances so you can find more information if desired. Prior to reading this book, you must have a strong background in MPI programming.