Suras are the term for Quranic sections or chapters.
Each Quranic sura has a name. That name either refers directly to some aspect of the sura's subject matter, else serves as a mnemonic, picking up on one or more words or sounds used in it. Contrast this with the twentieth sura, Ta Ha, which simply takes its name from its first two Arabic letters, ta and ha . Suras emanate from different times and places in the life of the prophet Muhammad. Although using a chronological sura arrangement might have certain pedagogical advantages, the fact is that no one can agree on the exact order.