1.1 This International Standard specifies a set of 93 graphic characters with their coded representations. It consists of a code table and a legend showing each graphic, its use and its name. Explanatory notes are also included. The character set is primarily intended for the interchange of information among data processing systems and within message transmission systems. 1.2 These characters, together with characters in the basic Cyrillic set, registered as number 37 in the ISO international register, constitute a character set for the international interchange of bibliographic citations, including their annotations, in the non-Slavic Cyrillic alphabets for the languages specified in 1.3. 1.3 This character set is intended to handle information in the following language groups: Abazian Kabardian Mordvin Abkhasian Kalmyk Nenets Adyghe Karachay Nivkh Aisor Kara-Kalpak Nogai Altaic Karelian Ossetic Avar Kazakh Romany Azerbaijani Khakass Sami Balkar Khanty Selkup Bashkir Kirghiz Shor Buryat Komi Tabasaran Chechen Koryak Tajik Chukchi Kumyk Tat Chuvash Kurdish Tatar Dargwa Lak Turkmen Dungan Lezghian Tuvinian Eskimo Lithuanian Udekhe Even Mansi Udmurt Evenki Mari Uighur Gagauzi Moldavian Uzbek Ingush Mongolian Yakut 1.4 This coded character set contains characters used since the Russian Revolution (1917). Some letters which appear to be unrepresented in the character table are actually graphic variants. Obsolete letters, those used for only a brief period in the late 19th century, have been excluded from this International Standard. This applies chiefly to early letters used in Chechen, Chuvash, Dargwa, Lak and Lezghian. Letters from their 20th century alphabets are included.