This pie chart visualizes operating system market share percentages for Android, Windows, Linux, and iOS. The visualization uses D3.js version 5 to bind the dataset to SVG elements, computing arc paths with `d3.pie()` and `d3.arc()`. A `d3.scaleOrdinal` with `schemeCategory10` assigns colors to each slice, and labels are positioned using `label.centroid()`. The example demonstrates basic pie chart construction with a small, hardcoded dataset in a single SVG container.