Muslims believe the Quran to be the final revelation of Allah to man, and a completion and confirmation of previous scriptures.
Four of these are mentioned by name in the Quran are 1. The Tawra (Torah or the Law) revealed to Musa (Moses). 2. The Zabur (Mizmor / Zemirot or Psalms) revealed to Dawud (David). 3. The Injil (Euangélion / Ewwangelliwon or the Gospel) revealed to Isa (Jesus). 4. The Quran revealed to Muhammad.
The Quran is divided into chapters called surah in Arabic, and then divided into verses called ayah. And again, Muslims believe the Quran was revealed by God verbally to Muhammad through the angel Gabriel. And that the Quran is “without error”.