This bubble chart compares major tech companies by research and development spending (x-axis) against revenue (y-axis), with bubble size encoding employee count and color distinguishing each company. It uses D3.js v7 to render an interactive SVG visualization, loading data from a CSV file. Hovering over a bubble triggers a custom tooltip showing the company's R&D spending, revenue, and total employees. A color legend on the right identifies each company, and the chart includes labeled axes with linear scales and a square-root scale for bubble radii.