Karena orang Arab belum mengenal cara pembuatan kertas, Muhammad menyuruh para penyalin menuliskan wahyu-wahyu itu di atas bahan-bahan primitif yang tersedia ketika itu, seperti tulang belikat unta, pelepah kurma, kayu, dan perkamen.
The implementation of a CBSA CPIC policy and MOU, the development of an audit plan/schedule, and centralized monitoring of audits conducted at HQ and the regions will provide for better coordination of CPIC audits, physical control over CPIC terminals, and reinforce information and general security awareness with users.jw2019 jw2019