The fixed navigation on the left leads to every area. The language switch opens the corresponding page in the selected language. Physics, Blogs and Firewalls have their own subdomains. Communications engineering and database technology are located on the main domain.
Original content
The content of the previous Physics and Firewalls websites was imported as retrieved on 14 November 2026. Original files remain unchanged. The new language versions translate the page text; downloaded PDFs retain their existing languages.