Ajaroumiya is a book on the science of grammar written by Ibn Garm, which he started with talking about the words and its types and a series with topics in a manner that he invented, easy to obtain for the students. It is one of the most important Arab grammar and the importance of the adult Ajrum, as it has been confronted to explain the scholars and grammarians in the past, and is taught in most universities of language and Sharia.