84.Specialized dictionaries provide in-depth information about a certain field. For example there are dictionaries for the specialized vocabularies of law, computer technology, and medicine. In addition, there are dictionaries of synonyms, clichés, slang, and even regional expressions. Such as the
(D)ictionary of
(A)merican Regional
(E)nglish（
(D)
(A)R
(E)）. There are also dictionaries of foreign languages, famous people’s names, literary characters’ names and place names.