RFID, or Radio Frequency Identification, is a technology that uses radio waves to automatically identify and track tags attached to objects. Each tag contains a microchip with stored information and an antenna that communicates with a reader. This system allows for quick and efficient data collection without the need for direct line-of-sight, making it useful in various applications like inventory management and access control. The RFID system consists of three main components: the tag, the reader, and the software that processes the data. Tags can be passive, active, or semi-passive, depending on their power source. This technology is widely used in industries such as retail, logistics, and healthcare to improve efficiency and accuracy in tracking items.