Answer Description
Near-Field Communication (NFC) is a method of mobile, contact-less payment commonly implemented by retailers, allowing customers to pay with their smartphone.
Wikipedia
Near-field communication (NFC) is a set of communication protocols by which two electronic devices communicate when they are brought within 4 cm (11⁄2 in) of each otherNFC devices are used in contactless payment systems, similar to those used in credit cards and electronic ticket smart cards, and allow mobile payment to replace or supplement these systems This is sometimes called NFC/CTLS and CTLS NFC, with contactless abbreviated CTLS NFC is used for social networking and for sharing contacts, photos, videos, and other files NFC devices can act as electronic identity documents and keycards NFC offers a low-speed connection with simple setup that can be used to bootstrap more-capable wireless connections
Near-field_communication - Wikipedia, the free encyclopedia