Transponder: consisting of an antenna, a coupling element, and a chip. Generally speaking, the tag is used as a transponder. Each tag has a unique electronic code attached to the object to identify the target object.
Reader: a device consisting of an antenna, a coupling element, and a chip to read (and sometimes write) tag information. It can be designed as a handheld RFID reader or a fixed reader.
Application software system: application layer software, mainly to collect data further processing, and used for people.