A very intuitive and smart website, with a nice use of colours and images. Even if there is not a sitemap, the encyclopedia website is usable and clear. Keywords can be searched by multiple criteria and tools (thesaurus, almanacs, dictionaries).
Multiple search criteria available. It is possible to search by thesaurus, by alphabetical order, by almanacs and additional encyclopedias
Infos and search results can be downloaded in a printer-friendly format
Help and faq are available but no sitemap is provided. Nevertheless, the interface design is so self-evident that more navigational aids are not needed
Good interface design with a nice choice of colours to distinguish thematic areas