Perhaps the most famous historical "index of taboo top" was the Catholic Church’s Index of Prohibited Books . For over 400 years, this list ranked heretical texts, scientific treatises (Galileo’s Dialogue ), and erotic literature. To be placed on this index was to achieve a dark honor—it guaranteed the book would become a bestseller among intellectuals.

Most open directories are generated by common web servers like Apache, Nginx, or Microsoft IIS. Decoding "Taboo" and "Top"