Modern English
Modern English (sometimes New English or NE as opposed to Middle English and Old English) is the form of the English language spoken since the Great Vowel Shift in England, which began in the late 14th century and was completed in roughly 1550.
Old English
Anglo-Saxon literacy developed after Christianisation in the late 7th century. The oldest surviving text of Old English literature is "Cædmon's Hymn", composed between 658 and 680. There is a limited corpus of runic inscriptions from the 5th to 7th centuries, but the oldest coherent runic texts (notably the Franks Casket) date to the 8th century. The Old English Latin alphabet was introduced around the 9th century.
With the unification of the Anglo-Saxon kingdoms (outside the Danelaw) by Alfred the Great in the later 9th century, the language of government and literature became standardised around the West Saxon dialect (Early West Saxon). Alfred advocated education in English alongside Latin, and had many works translated into the English language; some of them, such as Pope Gregory I's treatise "Pastoral Care", appear to have been translated by Alfred himself. In Old English, typical of the development of literature, poetry arose before prose, but King Alfred the Great (871 to 901) chiefly inspired the growth of prose.