ABBREVIATION IN CONTEMPORARY BULGARIAN LANGUAGE IN COMPARISON WITH THE CZECH LANGUAGE Dissertation work is aimed at confrontation study of abbreviation in Bulgarian in comparison with Czech and at the description of abbreviations as specific language symbols. Contemporary language tendencies and the changes in the field of abbreviation in relation to the language typology are taken into account. The work is dedicated to the grammatical, stylistic and semantic characteristics of the abbreviations, while a substantial part of the confrontation description addresses the graphical and initial abbreviations, which create a central part of the partial system of abbreviation formations. From the confrontational aspect, there is also described the ability of abbreviations to serve as word-formation base for derivatives. The dissertation work also includes the results of socio-linguistic research made by questionnaire method, where the respondents evaluated the abbreviations of an international character and the words containing abbreviated bases implemented into the text written in Cyrillic.