their Technical Note format, and altough it’s really dry information of a technical nature, in its own way it’s quite beautiful. A subdued but good use of fonts, good in-file linking that’s well distinguished from the rest of the page, a good executive summary at the top, the date of publication/update is prominently displayed, and they use shading and an indent to very clearly highlight code. And there’s a PDF equivalent available at the bottom, cause no matter how nice it looks online, a PDF will print better. Form following function, to ape the famous old line, but not devoid of form as many techies assume is appropriate for other techies.