The system of abbreviations in the "Izbornik" of Svyatoslav of 1073
This article is devoted to the problem of abbreviated words in secular-religious books of the XI century. «Izbornik» of 1073 year has been chosen as an object for researches. The author proposes the system of abbreviations and presents results of investigations of the one of the oldest datable written sources in the Ost-Slavic region. Conclusions about the cause of abbreviation words have been made as well as about the vocabulary composition of abbreviations and the level of sacral of the «Izbornik».