Millions who studied the Holy Quran in the Quranic schools, they were writing the Holy Quran on a wooden planks by coal and then licked it (First group), Calligraphers who specialize in writing the Holy Quran (Second group), and their number was a few since 1400 years compared to the number of Muslims, The rest of the calligraphers were writing some verses on the plates and attached to the walls.