Privacy policy
This is a static website with no analytics, advertising tags, or message collection.
Updated 24 October 2026.
What this site stores
These pages do not set cookies or use local storage. Interactive examples calculate results within your browser. They do not send entered values to a server.
Hosting and requests
A hosting provider receives technical information when serving a public website, including an IP address and requested URL. Our hosting provider may keep standard server logs. We do not use those logs to identify visitors, and we do not add analytics or advertising tags.
External links
Links to source repositories and documentation open websites operated by others. Their privacy policies govern what happens when you visit them. Fonts and styles on this site are served locally.
Enquiries
See the contact page for the editorial email address.