The document discusses the SEASR project and its Meandre infrastructure, which were sponsored by The Andrew W. Mellon Foundation. Meandre uses a dataflow execution paradigm and semantic-web driven approach to allow modular, reusable components to be assembled into computational flows. It provides a service-oriented architecture and uses semantic web concepts like RDF to describe components and flows in a machine-readable way, enabling discovery, sharing, and dynamic execution across heterogeneous systems from laptops to HPC clusters. Components have inputs, outputs, and properties and are connected to form flows to complete complex tasks. Meandre includes tools like a visual programming workbench and ZigZag scripting language to assemble flows from published components.