Radio Frequency Identification or RFID is a wireless non-contact use of radio-frequency electromagnetic fields to transfer data for the purposes of automatically identifying and tracking tags attached to objects. The tags contain electronically stored information. Some key aspects about RFID:

- RFID tags can be either active or passive. Active tags have a local power source like a battery and may be read from several meters away. Passive tags have no local power source and require the RFID reader to energize them. They typically only operate within inches or feet of the reader.

- RFID systems consists of RFID Enabled Smart Cabinets attached to objects, RFID readers to interrogate the tags, and backend information systems to process the data collected by RFID readers.

- RFID tag data can be read-only or read/write depending on the type of tag. Data is encoded digitally and can uniquely identify an item.

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