The Old Testament is the first section of the Christian Bible.  The Protestant version of the Old Testament is identical in content to the Bible of Judaism but not in the same order.  Although the earliest Christians though in terms of new and old covenants, it was not until around 200 AD that the term Old Testament was first used for the pre-Christian scriptures. The Protestant Old Testament contains a collection of formally recognized sacred books, thirty nine in all.  The Roman Catholic Old Testament contains several additional books.  The topics contained within deal with matters of human life and experience in terms of the ways and will of God and are generally grouped into three divisions: Law, Prophets, and Writings.  It is believed to have been canonized by at least 300 BC.