Old Testament n.
[C programmers] The first edition of K&R, the sacred text describing Classic C.
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.
The Christian name for the Jewish Tanach, which was adapted as the first part of the Christian Bible. The 39 books of the Old Testament are split into three distinct groups: The Torah, also known as the Pentateuch, which details the Creation, foundation of the tribe of Israel, and the Law; the Prophets, or Navim in Hebrew, and the Writings, called the Katuvim in Hebrew, which include the history books and the Psalms, Proverbs, Song of Solomon and Ecclesiastes (not to be confused with Ecclesiasticus, a book of the Apocrypha). Interesting tidbit: The Hebrew name, Tanach comes from the initials of each section: T for Torah, N for Navim and K for Katuvim. This is because Hebrew as a language has no specific vowels (so they are added in), and K is often changed to CH in transliteration.
The testament takes its name from the word for 'agreement,' and thus the Old Testament focusses on God's first1 agreement with mankind (the Law), whereas the New Testament focusses on the second - the Crucifixion. The entire Old Testament is written in Hebrew, and covers the period from the Creation (whatever date you set on that) to roughly 420 BC (around the time Malachi was doing the rounds.)
List of books with short summaries
The Torah
The Navim
The Ketuvim
The order of books in the Old Testament of the Christian Bible is: Genesis, Exodus, Leviticus, Numbers, Deuteronomy, Joshua, Judges, Ruth, 1 Samuel, 2 Samuel, 1 Kings, 2 Kings, 1 Chronicles, 2 Chronicles, Ezra, Nehemiah, Esther, Job, Psalms, Proverbs, Ecclesiastes, Song of Solomon, Isaiah, Jeremiah, Lamentations, Ezekiel, Daniel, Hosea, Joel, Amos, Obadiah, Jonah, Micah, Nahum, Habukkuk, Zephaniah, Haggai, Zechariah, Malachi.
1 - Yes, I suppose he had an agreement with Adam and Eve in the garden of Eden. It depends whether you count two people as mankind.
Thanks to Footprints for additions and suggestions and to GangstaFeelsGood for rephrasing suggestions and to arieh for telling me I got it wrong.
"Old Testament" vs. "Tanakh"
It is important to note that the Christian Old Testament is not identical to the Jewish Tanakh. As a careful reading of the previous entry in this node will demonstrate, certain books are classified differently by Jews and Christians, and the books appear in a different order in printed Bibles depending on the denominational affiliation of the publisher.
Order
For instance, Jews place the book of Ruth among the Ketuvim/Writings, the third category of documents collected in the Tanakh. However, Christians "promoted" Ruth to a place between Judges and 1 Samuel, in the section that Jews would call the Neviim/Prophets.
The reason for this is that the very end of Ruth provides a genealogy for King David. David, Ruth's descendant, is an important character in the books of Samuel, so Christian interpreters assumed that Ruth should be physically placed before Samuel in the canon. In the Christian view, then, one should read the Biblical books in the chronological order of the characters they describe. By contrast, Jews did not consider the book of Ruth to have the same kind of scriptural authority as the other Neviim, even though its main character was an ancestor of King David. This is because the book of Ruth was written much later than the books of Samuel. Thus, in this case they decided to read the Biblical books in the chronological order of their composition.
(This doesn't go for the entire Bible, of course. Scholars are pretty sure that Amos was written well before Genesis, but nobody reads Amos first. Still, all this is by way of illustrating that ideas of scriptural authority are extremely complex, and change from religion to religion.)
Numbering
Jews and Christians also count the books differently. Samuel and Kings are each considered a single book in the Tanakh. However, early Christians split them into two; therefore, copies of the Christian Old Testament will list 1 Samuel and 2 Samuel separately, and 1 Kings and 2 Kings separately.
(To make things even more confusing, some Roman Catholic Bibles and most Eastern Orthodox Bibles number these same books 1, 2, 3, and 4 Kingdoms, following the lead of the Septuagint. Therefore, in old-fashioned theological studies, "2 Kings" occasionally refers to what most people call 2 Samuel, and "3 Kings" actually refers to what the majority calls 1 Kings!)
The Tanakh contains a book called "The Twelve," which contains the prophecies of Hosea, Joel, Amos, Obadiah, Jonah, Micah, Nahum, Habakkuk, Zephaniah, Haggai, Zechariah, and Malachi. But the Christian Old Testament considers each of these a separate, short book. Similarly, Ezra and Nehemiah are combined into one book in Hebrew, but they are separated in Christian Bibles. The Psalms are numbered slightly differently.
Content
In content, Protestant Bibles have more in common with Jewish Bibles than Catholic and Orthodox Bibles do. Catholic and Orthodox Bibles contain a substantial amount of extra material, including extra books (e.g., Tobit, Judith, the Wisdom of Solomon, and others) and extra material within existing books (most notably Esther and Daniel). Most of this extra material is drawn from the Septuagint, that is to say, the Greek translation that was made of the Hebrew Bible in the third and second centuries B.C.E.
In other words, even Christian Old Testaments are not all alike.
So What Do We Call It, Then?
As I hope I have made plain, the terms "Tanakh" and "Old Testament" both have to be used very carefully. They are not the same, and the differences are important. Furthermore, the assumption that the Jewish Bible is an old testament, that is to say an old contract or covenant, to be replaced with a "new" testament or contract, is supersessionist and therefore insulting to Jewish people. Personally I prefer the generic term Hebrew Scriptures, since it is useful and descriptive without bringing all this theological baggage with it.
(Even that term, alas, is somewhat misleading, since not all of the "Hebrew" Scriptures are in Hebrew: several chapters of Daniel and Ezra were written in Aramaic. Nobody said religious studies was easy.)
Some ecumenical Christians use the terms "First Testament" and "Second Testament" as a way of expressing their view that the Hebrew Bible has intrinsic worth, as opposed to simply being the opening chapters of the "real," "new" story. But so far as I am aware, this usage hasn't really caught on. If you are in a church that uses these terms (or others) regularly, I'd be curious to hear from you.
Further Reading:
Any good quality study Bible is useful for comparing Catholic, Protestant, Orthodox, and Jewish classifications of Biblical books. I recommend the HarperCollins Study Bible and the Oxford Study Bible, both of which use the superb NRSV translation for their Biblical texts, and both of which contain excellent notes on the issue of canonization in Jewish and Christian communities.
A basic chart comparing canons can be found at: http://myweb.lmu.edu/fjust/Bible/Heb-Xn-Bibles.htm
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