What will replace bar code as the most effective means of item identification?

Electronic label. Bar code is a graphic identifier that arranges a number of black bars and blanks with different widths according to certain coding rules to represent a group of information. Electronic tag will replace bar code as the most effective means of item identification. Electronic tag, that is, ESL electronic tag, is a technology that can automatically identify without touching instead of traditional paper tag. It can identify the target object and obtain data through radio frequency signals without manual intervention.