A multi-field dictionary is a specialized dictionary that has been designed and compiled to cover the terms within two or more subject fields. Multi-field dictionaries should be contrasted with single-field dictionaries and sub-field dictionaries. The typology consisting of these three dictionaries is important for a number of reasons. First of all, a multi-field dictionary is an example of the ordinary technical dictionary, covering numerous subject fields, e.g. banking, economics, finance, insurance and marketing.