RFID (Radio Frequency Identification) is a technology that uses radio waves to automatically identify objects. It consists of three main parts: RFID tags attached to objects, RFID readers that can read the tags, and a data system to process the information. RFID provides several benefits over barcodes such as not requiring line of sight and being able to identify multiple objects rapidly and simultaneously. However, RFID also faces issues such as higher costs compared to barcodes, lack of global standards, and potential privacy and security concerns. Overall, RFID is a useful automatic identification technology but still has challenges to address before it can completely replace barcodes.