Physical Infrastructure: The tangible, built structures and facilities that enable the delivery of essential services, such as transportation networks, utility systems, communication networks, and public buildings.
Institutional Infrastructure: The organizational frameworks, policies, and regulations that govern and facilitate the functioning of a society or economy, such as legal systems, financial institutions, and government agencies.
Technological Infrastructure: The underlying technological systems and platforms that enable the development and deployment of new products, services, and innovations, such as information and communication technologies, research and development facilities, and digital infrastructure.