The english old testament has the same books as the hebrew bible, although they are arranged differently. unlike the english old testament, the hebrew bible is arranged into three main sections.
what are these three sections?

The three sections are the Torah (law), the Nevi'im (prophets) and the Ketuvim (sayings).

Explanation:

The English Old Testament of the Christians' Holy Bible has the same 39 books but categorized differently. While the books have their own identity in the Christian Bible, In the Hebrew Bible, it is not so.

The Hebrew Bible divides the 39 books into three sections, according to their themes.

1. The first section of the book is called the Torah, or the law. This section includes the writings of Moses which became the law of the Israelite people. The books of Genesis to Deuteronomy are included in this section.

2. The second section called the Nevi'im is also the writings of the prophets. Further subdividing them into three sub-branches, they are-

3. The third section is the Ketuvim which includes the book of sayings of Psalms, proverbs, Job, Song of Songs, Ruth, Lamentations, Ecclesiastes, Esther, Daniel, Ezra, Nehemiah and Chronicles.