Edited sentence: A very strong example of the early copying and conserving books is that of the holy Quran.After the prophet Muhammad, his companion and the first Caliph Abu Bakr, on the recommendation of Umar Bin Alkhattab, assigned the secretary of the prophet Zaid bin Saabit to compile the first official scripture of the holy Quran.By the time of the third caliph Uthmaan, the Islamic state had spread over a big portion of the earth.He compiled one scripture and got it verified by all the companions who had memorized the whole holy book while the prophet was alive.He ordered the preparation of the official copies of the first official scripture.The copies were duly verified for accuracy.Then this first official scripture was kept at the house of Hafsa, the wife of the prophet.These copies were sent to each city of the caliphate so that further copies can be made locally with the perfect accuracy.Zaid collected all the available scriptures of the holy Quran scripted by different companions of the prophet during his life