DKOI (Russian: ДКОИ, Двоичный Код Обработки Информации, "Binary Code for Information Processing") is an EBCDIC encoding for Russian Cyrillic. It is a Telegraphy-based encoding used in ES EVM mainframes. It has been defined by several standards: GOST 19768-74 / ST SEV 358-76, ST SEV 358-88 / GOST 19768-93, CSN 36 9103.