¥Theoriginals were probably written over the period1400-400 BC.
¥Theearliest fragments discovered to date are amongthe Dead Sea Scrolls: parts of Exodus and Samuel from~250 BC.
¥Theearliest complete book (Isaiah) comes from the same find, dating to ~125 BC.
¥Theearliest complete copy of the whole OT, surprisingly,is a Greek translation, from ~AD 350.
¥Theearliest complete Hebrew manuscript only goesback to about AD 950.