Tabaqat of Arab linguists, grammarians and writers, by the linguist from Baghdad, Abd al-Rahman ibn Muhammad ibn al-Anbari (513/1119 - 577/1181). Ibn al-Anbari starts with an introduction mentioning the origin of grammar, then presents reasons for the work that follows. He categorizes the scholars in chronological order from early times to his time. Research/Edited by Muhammad Abu al-Fadl Ibrahim.