Other thesauri and synonym dictionaries are organized alphabetically. Examples of conceptual dictionaries are picture dictionaries, thesauri, and visual dictionaries. Well known thesauri include the Art and Architecture Thesaurus and the ERIC Thesaurus. The sources of information for Watson include encyclopedias, dictionaries, thesauri, newswire articles and literary works. "Bunruitai" collation is obsolete among modern Japanese dictionaries, with the exception of thesauri. A familiar example of lexicology at work is that of dictionaries and thesauri. In multilingual thesauri equivalence also applies between corresponding terms in different natural languages. Information retrieval thesauri are formally organized so that existing relationships between concepts are made clear. ISO 5964 was the ISO standard for the establishment and development of multilingual thesauri. Vol.1 contains a list of all universal and special classification systems and thesauri. Ingetraut Dahlberg was active in the area of classification, thesauri, terminology and knowledge organization. Its full title was "Guidelines for the establishment and development of multilingual thesauri". The other consists of alphabetical indexing languages such as Thesauri and Subject Headings systems. Some non-English thesauri have also adopted this model. Hundreds of thesauri have been produced since then, perhaps thousands.