Privacy and browser storage
How local notes, checklists, hosting requests and external links work.
Reading and local tools
You can read the guides without an account. Search and category filters run in your browser. Optional checklists and notebook entries use this site’s local browser storage. They are not uploaded to a processing server or synchronized to an account. Clear controls remove saved entries; browser settings can remove all site storage.
Downloads
Notebook CSV files are created on your device after you choose to export. Printing uses your browser. Save a copy of notes you want to keep before clearing site data.
Hosting requests
Pages, styles, scripts and original SVG diagrams load from this host. Operational server logs may contain IP addresses, request times, requested paths, browser information and errors. No fixed retention period is promised here. This website has no account, newsletter, payment or comment form.
Advertising and analytics
Google AdSense advertising code is included on this website. Ads can be displayed only after Google approves the site and subject to the account's advertising settings.
Third-party vendors, including Google, may use cookies to serve ads based on visits to this website and other websites. Google's advertising cookies can enable Google and its partners to serve personalized ads where permitted.
You can manage personalized advertising through Google Ads Settings. Other advertising vendors may offer their own controls; additional opt-out information is available at YourAdChoices.
See how Google uses information from sites that use its services. No separate audience analytics service has been added. Where consent controls are required, ad serving depends on the applicable consent settings.
Contact and external references
Contact links open the main publisher site, where its contact form and privacy notice apply. External source sites operate independently and have their own privacy practices. Do not put identification numbers, bank information, passwords or sensitive health records into notebook fields or shared exports.
Notice dated 20 October 2026.
Article popularity
Articles are ordered by aggregate reading counts. An anonymous random visit token is kept in this browser session so repeatedly opening the same article within thirty minutes does not repeatedly increase its count. The counting service stores a keyed hash of that token temporarily and aggregate article totals. It does not create an account or store the token with notebook entries. The token ends with the browser session; temporary deduplication records are removed after a day. Operational hosting logs are described elsewhere in this notice.