595 INTRODUCTION During the past decade, unmanned ground vehicle (UGV) systems have been used successfully by military services and are increasingly being used to conduct dangerous and life-threatening tasks for law enforcement as well as first responder and disaster relief efforts around the world. As the application of UGV systems becomes more pervasive, their deployment and life cycle logistics support become major concerns. As UGV missions call for execution of more complex tasks, it becomes necessary to integrate advanced technolohe Advanced Explosive Ordnance Disposal Robotic System (AEODRS) is a Navy-sponsored acquisition program developing a new generation of open, modular explosive ordnance disposal (EOD) robotic systems. The program has developed a common architecture for a family of systems. The foundation of that common architecture is the careful partitioning of EOD robotic systems into capability modules and the definition of intermodule interfaces based on recognized and accepted open standards. This partitioning facilitates module-level interoperability for more rapid technology insertion and removes interface incompatibilities that are barriers to reusing modules among members of the family of systems. In this article, we discuss our experience with the integration and testing of a modular EOD robotic system based on an open systems architecture for the AEODRS family of systems. We describe a phased approach to module and system testing focused first on verif ication of module compliance with interface and performance specifications and subsequently on system performance and operational reliability. Finally, we share lessons learned in standards assessment and open systems architecture specification through the specification, integration, and testing of multiple independently developed capability modules. Integration of Advanced Explosive Ordnance Disposal Robotic Systems Within a Modular Open Systems Architecture