This interactive collapsible knowledge graph displays a hierarchical taxonomy of computer science topics, with nodes that expand and collapse on click and text labels that link to Wikipedia pages. Built with D3 v4, the visualization uses `d3.forceSimulation` with link, charge, and positional forces to arrange the SVG elements, while `d3.zoom` enables panning and scaling. Node depth is calculated recursively, and data comes from a taxonomy dataset with named nodes, rendered as circles with text labels.