Rusuhu'l-Lisân fî Hurûfi'l-Kur'ân

This master's thesis work XVI. in the century, (in the first period of classical Ottoman) written; and largely of old Anatolian Turkish Turkish from the migration period "with the characteristics of old Anatolian Turkish" Hayreddin bin Hamdullah "Rusûḫu'l-Lisan Fî Ḥurûfi'l-Ḳuran"contain his work. This study's goal is to reveal works in other words language characteristics so that it has been dealt under three titles as ''Language Review'', ''Text'' and ''Grammatical Index''. In the ''Review'' part, phonological and morphological features of text were examined and language characteristics were tried to be revealed. In the ''Text'' part, the study transcription was completed and was transferred to the Latin alphabet. In the ''Grammatical Index'' part, all the words in the text were arranged in alphabetic order and their meanings were written against them. In addition, as indication each word which is in language and unconventional and active forms of all words were arranged in subordinate form under the related word. At the end of this study, there is a bibliography showing the references. Keywords: Turkish Language, Old Anatolian Turkic, Language Examination.