Paying with cash entails feeding coins or notes into a machine. To pay with a card, you must swipe, insert, or tap the card onto the reader. The POS system establishes a connection with the cardholder's bank, checks funds to complete the transaction, asks for a PIN, and verifies if the payment was accepted or denied. POS solutions are also used by e-commerce companies to track and fac... https://www.nexinov.com/pos