The results of this research programme are of great importance for the presentation of Slovene science to the world. At the same time the results are also the fundamental source for other Slovene specialized branches of linguistics (e.g. dialectology, lexicology, terminology, etc.) and also for other non-linguistic studies, especially for those researchers who complement their work with cultural and historical informativeness of the language (e.g. archaeology, history, ethnology, etc.). The programme creates a knowledge base which is fundamental for application in popular science purposes. Indirectly this knowledge may be used directly in specialist linguistic and general education of Slovene population (e.g. schools, media, etc.). Good knowledge of one's origin and mother tongue development is a key factor for self-confidence and preservation of our national identity.