This short biography of our 1st Imam, Hazrat Ali Ibne Abu Talib (a.s.) was written essentially as part of a course-work for those who have registered themselves as students of the correspondence course offered by the Bilal Muslim Mission of Tanzania.The overall concern for writing this unit has been to provide brief notes on the main aspects of the life-history of our 1st Imam for the young readers who, for the first time, have been introduced to the formal study of this great personality in history. In no way therefore should this work be regarded as comprehensive or complete.As a matter of fact, because this unit was prepared in a short time, it is possible that several corrections may become needful - in future.