Computational infrastructure is the comprehensive system of hardware, software, networks, and data resources, along with the necessary organizational frameworks, that underpins computational research and data-intensive academic work. As an academic concept, it investigates the design, implementation, management, and optimization of these integrated systems to enable scientific discovery and scholarly inquiry. Key characteristics include the heterogeneity of components, requirements for scalability and security, and its fundamental significance in determining the scope and feasibility of modern, computationally-driven research methodologies across disciplines.