Though it is not known exactly when Christians began to use the codex, one reference work states: So universal is the Christian use of the codex in the second century that its introduction must date well before A.D.
ಮೊತ್ತಮೊದಲು ತಯಾರಿಸಲಾದ ಪುಸ್ತಕಗಳನ್ನು ಕೋಡೆಕ್ಸ್‌ ಎನ್ನುತ್ತಾರೆ.