The holy book of Islam, the Koran as a book is the result of: 1. revelations given to Muhammad in the period 610- 632 (Muhammad's death) 2. writing down of these revelations by people around Muhammad in a period probably starting some years after 610, and ending a couple of years after 632 3. compiling of these writings stretching from mid-630s and perhaps until mid-650s 4. vowelling and dotting of the text (ancient Arabic was written without dots, leaving some letters look identical, and without vowels, which can make two different words look identical). Old Koran Essential to the reading of the Koran are the interpretations, which are still conducted, but which were more normal and accepted in the first centuries of Islam. As the Koran has a structure and a language, as well as allusions, which often are difficult for the normal Muslim to understand, a whole science were built around the comprehension of the Koran. The early Muslims studied history, language and nature science in an effort of understanding the Koran better. The product is surprisingly well accepted by the whole Muslim society, and no Muslim child or adult of today, studying the Koran, does this without help from the interpretations built on the early science of the Koran.