NFC tags are programmed with just about any sort of information and then plopped into almost any product, letting you read them with a smartphone or another NFC-capable device.
NFC is a type of radio communication standard, much like Bluetooth, Wifi and other networking technologies.
-ISO 14223 RFID use on animals
-ISO 14443 RFID use in passports and ID cards
-ISO 15693 RFID use for financial transactions
-ISO 18000 RFID use for item management