About the Mystery of the Letters the mid-6th century, in which Mar Saba had played an important role. The anonymous author of the treatise declares he was prompted to the study of the secret meanings of the letters by the words of the Apocalypse, "I am the Alpha and Omega", and that he subsequently received a vision about them on Mount Sinai. The author proposes a re-modelled Greek alphabet reduced to 22 letters on the model of the 22 letters of Hebrew (discounting Xi Ξ and Psi Ψ), and with the Hebrew letter names. He then interprets these letters as symbolic figures of 22 works of
Syriac alphabet addition to the sounds of the language, the letters of the Syriac alphabet can be used to represent numbers in a system similar to Hebrew and Greek numerals. Besides Syriac, the alphabet has been used to write other languages. When Arabic began to be the dominant spoken language in the Fertile Crescent after the Islamic conquest, texts were often written in Arabic with the Syriac script as knowledge of the Arabic alphabet was not yet widespread. Such writings are usually called "Karshuni" or "Garshuni" (). Garshuni is often used today in Neo-Aramaic writing, such as letters and fliers. Malayalam was