The Uthmanic Codex refers to the standardized version of the Qur'an compiled under the third caliph, Uthman ibn Affan, around 650 CE. This effort aimed to unify the various recitations and versions of the Qur'an that existed at the time, ensuring consistency in the text. Uthman's codex was based on earlier manuscripts and was intended to preserve the original revelations received by the Prophet Muhammad. To facilitate this standardization, Uthman ordered the collection of all existing Qur'anic materials and appointed a committee of scribes, including Zayd ibn Thabit, to compile the text. Once completed, copies of the Uthmanic Codex were distributed to different regions of the Islamic empire, while other versions were ordered to be burned, solidifying its authority as the definitive Qur'anic text.