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Abu Ali al-usayn ibn Abd Allah ibn Sina also known as Ibn Sina and commonly known in English by his Latinized name Avicenna (980-1037) was a Persian polymath, physician and Islamic philosopher. The Qanun (trans: The Canon of Medicine) is one of the most important of the works of Ibn Sina. It is divided into five books, of which the first deals with general principles; the second with simple drugs arranged alphabetically; the third with diseases of particular organs and members of the body from the head to the foot; the fourth with diseases which though local in their inception spread to other parts of the body, such as fevers and the fifth with compound medicines.