The dictionary contains 19,759 entries covering terms from 25 specialist fields. It determines the preferred use of terms based on their technical and linguistic appropriateness, frequency of use, authors' expertise, and source material. Preferred terms or their meanings are defined, while non-preferred terms are cross-referenced to the preferred term or meaning. Terms or meanings used in one or two fields are marked with the relevant field markers. If they are used in several professional fields, field markers are not indicated. The dictionary is intended for experts, journalists, students, and non-experts interested in a particular professional field.