Radio Frequency Identification Device (RFID) including tracking stock, passports, automobiles, contactless payment

Characteristics, uses, advantages and disadvantages of direct data entry devices including: magnetic stripe reader, chip and PIN reader, Radio Frequency Identification (RFID) reader, Optical Mark Recognition/Reader (OMR), Optical Character Recognition/Reader (OCR), bar code reader, QR scanner

The uses of wi-fi and Bluetooth