This bar chart traces the shrinking feature size of semiconductor devices from 1966 to 2021, with each bar representing a specific processor or logic chip. A logarithmic y-axis scales the nanometer values, while hovering or clicking a bar highlights the selected device. The visualization combines React state management with D3 v7 for rendering, using `d3.scaleBand` and `d3.scaleLog` for scales, `d3.axisBottom` and `d3.axisLeft` for axes, and CSS transitions for interactive feedback. Data is loaded from a CSV file.