10 Nathan Evans Chris GauthierDickey Christian Grothoff Krista Grothoff Jeff Keene Matthew J. Rutherford 2009 Denver University of Denver 04/2009 dup systems distributed language stream programming parallel This paper introduces the DUP System, a simple framework for parallel stream processing. The DUP System enables developers to compose applications from stages written in almost any programming language and to run distributed streaming applications across all POSIX-compatible platforms. Parallel applications written with the DUP System do not suffer from many of the problems that exist in traditional parallel languages. The DUP System includes a range of simple stages that serve as general-purpose building blocks for larger applications. This work describes the DUP coordination language, the DUP architecture and some of the stages included in the DUP System. We also discuss future plans for a higher-level aspect-oriented language that would enable developers to specify their distributed applications at a higher level.