The Tanach is what many would call the Bible (or Christians would call the Old Testament). Don't confuse the Tanach with the Torah, which is a constituent part of the Tanach.
The word Tanach is an acronym based on its three constituent parts: Torah, Nevi'im (Prophets), and Ketuvim (Writings). The Torah, Nevi'im (Prophets), and Ketuvim (Writings) are separate compilations of works (24 in number) that are often published together (i.e. as the Tanach).
The Torah, Nevi'im and Ketuvim are detailed below.
Torah | Neviim | Ketuvim
Index to Jewish Texts