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The One VA Enterprise Architecture (OneVA EA) is a comprehensive picture of the Department of Veterans Affairs' (VA) operations, capabilities and services and the business processes and IT capabilities that support them. The VA's architecture is an evolving entity built through ongoing collaboration between business and technology leaders and staff across the administration. As the organization evolves and strives to meet change, its architectural picture changes. The Department of Veterans Affairs VA Technical Reference Model (One-VA TRM) is one component within the overall EA that establishes a common vocabulary and structure for describing the information technology used to develop, operate, and maintain enterprise applications. Moreover, the One-VA TRM, which includes the Standards Profile and Product List, serves as a technology roadmap and tool for supporting Office of Information & Technology (OI&T). This table displays the number of One-VA TRM entries associated with each VA category.