Varieties of Arabic
There are many varieties of Arabic (also called dialects of Arabic or vernacular languages) in existence. Arabic is a Semitic language within the Afroasiatic family that originated on the Arabian Peninsula. It is classified as a macrolanguage comprising 30 modern varieties, including its standard form. The largest divisions occur between the spoken languages of different regions. Some varieties of Arabic in North Africa, for example, are not easily comprehensible to an Arabic speaker from the Levant or the Persian Gulf. Within these broad regions further and considerable geographic distinctions exist, within countries, across country borders, even between cities and villages.
Damascus Arabic
DA is one of the most represented and researched Arabic dialects; 
It has been researched or discussed by Grotzfeld (1965), Amrbros (1977), Cowell (1964) Cantineau and Helbaoui (1953), Kuhnt (1958), Kassab (1970), Ferguson (1961), Bloch (1964) and (1965), Bergsträsser (1924), which also contains around fifty-pages worth of transcribed DA, and the twelve-volume course written by the US Defense Language Institute (1983).