The use Smart Cards is becoming an edge today because of its ease of use for protected data storage and transmission with least human interference. Even there is no need to swipe or insert the card into the slot (card reader), this tech has really saved you time.
These cards communicate with card readers in close proximity (nearness) to the reader. There are Mass transit systems which use the cards to process transactions swiftly as people walk through terminals.
Smart cards use a technology parallel to RFID technology to communicate with the card readers. RFID technology is used to trace packages by scanning the RFID tags placed on packages by distribution companies. Contactless smartcards act the same way where the end user just need to be in near proximity to the card reader.
These cards are being used for secure transactions, recognition, storing significant data, and authenticating identity with very little effort for people who use and bear them.
Smart card technology invented as a mass transit application since this was required to process people through station terminals speedily. The higher demands more and more velocity and effectiveness led to the introduction and expansion of contactless smart card technology.