A stacked bar chart visualizes the percentage of technology adoption across categories, with each bar color-coded through an ordinal scale and labeled with its exact value. The chart uses d3.csv to load data, then d3.scaleBand and d3.scaleLinear to position and size the rectangles, while d3.scaleOrdinal assigns colors. Labels are added via SVG text elements, all rendered within a fixed-width SVG container.