To address the Armys need for a Hardware Open Systems Technology (HOST)-conformant mission computer product, Physical Optics Corporation (POC) proposes to develop a HOST-Conformant, Adaptable, Modular, Interoperable, and Secure Mission Computer (HAMIS) System. The innovation in HAMIS reduces obsolescence, integration, maintenance, and upgrade costs and improves interoperability, modularity, and multi-vendor solutions. It also reduces the use of proprietary interfaces, preventing the issue of vendor lock. In addition, its reconfigurable interface architecture allows non-conformant mezzanine cards to be directly interfaced though a software change, thus allowing new functionalities to be rapidly incorporated. The HAMIS design, using a POC-built novel Tier II specification, results in an open architecture that includes benefits of widely accepted core technology standards for embedded systems. In Phase I, POC will conduct an analysis, recommend an architecture that meets the HOST Tier I specifications, and recommend product performance attributes. We will study and analyze Tier II specifications and recommend a new Tier II HOST specification. We will demonstrate feasibility by modifying and testing an existing HOST-based processor node. In Phase II, we will develop all necessary Tier II Standards that support core technologies, develop a Tier III Component Specification, and develop a technology readiness level (TRL)-6 prototype.mission computer,Host,Open Systems,Future Airborne Capability Environment (FACE),scalable,Modular,interoperable,upgradeable