Matching Pairs Flash Cards Online version Get ready for this card game by MARTIN EMILIANO CAMACHO GUERRERO 1 What is true and valid, what really counts 2 Establishment in which any type of consumer product is sold. 3 Person who uses the services of a professional or a company, especially one that does so regularly. 4 Another equivalent name is also used, the POS (Point of Sale Terminal). ... The POS Machine is an electronic type device with a screen and a keyboard. It is a technology that adapts to payments through debit and credit cards. 5 Piece of metal, generally round and with a relief on each side, to which a certain economic value is assigned and is used as a legal means of payment.