A force-directed graph shows connections between software applications, with nodes representing applications and links representing interfaces between them. The visualization uses a d3.forceSimulation with forceManyBody, forceLink, forceCenter, and forceCollide to position nodes, while SVG circles and lines render the network. Data comes from two CSV files: applications.csv defines node properties (including a colorID) and interf.csv provides source-target pairs with descriptive names. Users can drag nodes to reposition them, and the simulation updates link positions dynamically. Node labels display application IDs, though the colorID column remains unused.