Developing Heterogeneous Applications Using Zoom and HeNCE, Richard Wolski, Cosimo Anglano, Jennifer Schopf, Francine Berman, Proceedings of the Workshop on Heterogeneous Computing Scientific Computing, Santa Barbara, CA, April, 1995. We couple the Zoom representation designed to facilitate development of heterogeneous applications, and the HeNCE graphical language and tool, designed as a representation for and an executional model of heterogeneous programs targeted to PVM. The combination of Zoom and HeNCE provides a hierarchical representation which exposes performance issues and a means of automatically translating that representation into code executable on heterogeneous networks of computers.