It makes it so much easier to read, also the only diference between the Catholic Bible and Protestant Bilbe is that the Catholic Bible has six more books, the rest is the same.
Original Post
The Old Testament
The Septuagint
In the third century B.C., the Jewish scripture was translated into Greek for the convenience of the many Jews who were not fluent in Hebrew. This translation was known as the Septuagint [SEP tuh jint], often abbreviated as "LXX." The name Septuagint comes from the Greek word for ‘seventy’ (hence the symbol LXX, 70 in Roman numerals) and refers to the tradition that seventy-two rabbis worked on the translation.*
The First Christian Bible
At the time the Christian Bible was being formed, the Septuagint was in common use by Jews and Jewish Christians, and Christians adopted it as the Old Testament of the Christian Bible. However, around 100 A.D., Jewish rabbis revised their Scripture and established an official canon of Judaism which excluded some portions of the Greek Septuagint. The material excluded was a group of 15 late Jewish books, written during the period 170 B.C. to 70 A.D., that were not found in Hebrew versions of the Jewish Scripture. Christians did not follow the revisions of Judaism and continued to use the text of the Septuagint as the Old Testament.
Protestant Bibles
In the 1500s, Protestant leaders decided to organize the Old Testament material according to the official canon of Judaism rather than the Septuagint. They moved the Old Testament material which was not in the Jewish canon into a separate section of the Bible called the Apocrypha. So, Protestant Bibles then included all the same material as the earlier Bible, but it was divided into two sections: the Old Testament and the Apocrypha. Protestant Bibles included the Apocrypha until the mid 1800s, and the King James Version was originally published with the Apocrypha. However, the Apocrypha was considered less important, and Bible publishers eventually dropped it from most Protestant editions. The books of the Apocrypha are also known as the deuterocanonical books.
Catholic and Orthodox Bibles
The Roman Catholic and Orthodox Churches did not follow the Protestant revisions, and they continue to base their Old Testament on the Septuagint. The result is that these versions of the Bible have more Old Testament books than most Protestant versions. Catholic Old Testaments include 1st and 2nd Maccabees, Baruch, Tobit, Judith, The Wisdom of Solomon, Sirach (Ecclesiasticus), additions to Esther, and the stories of Susanna and Bel and the Dragon which are included in Daniel. Orthodox Old Testaments include these plus 1st and 2nd Esdras, Prayer of Manasseh, Psalm 151 and 3rd Maccabees.
The New Testament
The Protestant, Catholic and Orthodox New Testaments are identical and contain 27 books.