Mine’l-İlmi’l-Hisâbü’l-Nefis is a mathematical work that deals with the science of calculation in the Ottoman period. The work is important in terms of the history of science because it deals with the accounting issues in the Ottoman period and the accounting mathematics of the period. The expression “iy kān-ı kerem” in Mine’l-İlmi’l-Hisâbü’l-Nefis suggests that the work is a copyrighted work dedicated to one of the leading names of the period. There is no record of the author or copyist in the work. However, the work’s similarity to the accounting type work called Mürşidü’l-Muhasibin dated 1511 and its origins in the 15th-16th centuries. The fact that an example of the verse problem in the books between the centuries and the centuries is found in the work gives important information that the work was written in the 16th century. In addition, Arabic terms and phrases were used extensively. The use of the Turkish mathematical term in the work is limited. Even though mathematical terms are expressed with compound verbs, the work requires knowledge of the mathematical terms and understanding of its period. Although a heavy language is used in Mine’l-İlmi’l-Hisâbü’l-Nefis, the work contains spelling, sound and form features that reflect the transition to Classical Ottoman Turkish. The fact that the movements in the text are regular and the writing is of a quality that can be called beautiful make it easier to understand these features. In this study, it is aimed to introduce the prose mathematical work named Mine’l-İlmi’l-Hisâbü’l-Nefis, registered in Manisa Provincial Public Library, number 45 Hk 1753, and to examine the main linguistic features of the work. Mine’l-İlmi’l-Hisâbü’l-Nefis, which deals with the science of calculation, was written in naskh with vowels. There are seven lines on each page of the manuscript, which is missing from the beginning and the end. It is hoped that the findings obtained from Mine’l-İlmi’l-Hisâbü’l-Nefis will contribute to Turkish language studies.