This paper describes a Distributed Processing System (DPS) geographically separated, functionally organized, task oriented, and connected on an efficient high-speed serial data bus. Military Systems designers are given the working tools to configure a highly respon-sive and adaptable system capable of being phased into current applications with a minimum of disturbance by utilizing current software, yet providing a means for constantly incor-porating new technology. A 20-Mbit serial data bus with a modified SDLC protocol provides efficient communication between nodes through the use of numerous addressing modes. A dual redundant bus with multiple bus capability provides a highly survivable system. The Litton DPS is a relatively new development and its first application, aboard a U.S. Navy ship, is described.