Terminology science is a branch of linguistics studying specialvocabulary. The main objects of terminological studies are special lexical units, first of all terms. They are analysed from the point of view of their origin, formal structure, their meanings and also functional features. Terms are used to denote concepts, therefore terminology science also concerns itself with the formation and development of concepts, as well as with the principles of exposing the existing relations between concepts and classifying concepts; also, with the principles of defining concepts and appraising the existing definitions. Considering the fact that characteristics and functioning of term depend heavily on its lexical surrounding nowadays it is common to view as the main object of terminology science not separate terms, but rather the whole terminology used in some particular field of knowledge. Terminological research started seventy years ago and was especially fruitful at the last forty years. At that time the main types of special lexical units, such as terms proper, nomens, terminoids, prototerms, preterms and quasiterms were singled out and studied. A nomen, or a nomenclature unit, is a name of a single notion or a certain unit of mass production, e.g. prefix dis-; Canon 550D; UA-24; etc. Terminoids, or jargon terms, are special lexical units which are used to name the phenomena that are absolutely new and whose concepts are not interpreted in a monosemantic way. E.g., Salmon Day, mouse potato, etc. Prototerms are special lexemes that appeared and were used in prescientific times. Preterms are a special group of lexemes which is represented by special lexical units used as terms to name new scientific notions. They are represented by a vast descriptive pattern, e.g. business process reengineering, management by walking about, etc. The main principles of terminological work were elaborated, terminologies of the leading European languages belonging to many subject fields were described and analysed. It should be mentioned that at the former USSR terminological studies were conducted on an especially large scale: while in the 1940s only four terminological dissertations were successfully defended, in the 1950s there were 50 such dissertations, in the 1960s their number reached 231, in the 1970s – 463 and in the 1980s – 1110. As the result of development and specialising of terminological studies, some of the branches of terminology science – such as typological terminology science, semasiological terminology science, terminological derivatology, comparative terminology science, terminography, functional terminology science, cognitive terminology science, historical terminology science and some branch terminology sciences – have gained the status of independent scientific disciplines.
