For decades the U.S. Department of Defense (DoD), has been trying to harness the power and rewards of Open Architectures (OA) to achieve flexible weapon systems with low costs of integration and rapid upgrade capabilities. OAs provide a method for rapidly applying cybersecurity to systems as part of standardization updates. Recently, the DoD has directly endorsed OAs as a game-changer for weapon system development and identified clear OA leaders. This sets the stage for a future generation of weapon systems that support rapid integration, modification, and upgrades to enable warfighter capabilities in the field. This paper presents the difference between open architecture and open systems, a short history of OAs in the DoD, discusses how the DoD has renewed its support of OA, and ideas to maintain the momentum.
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