Dating for professionals with credit cards
They created a numbering scheme that identified the issuer of the card as well as the customer account.This is the reason the modern UATP cards still start with the number 1. airlines offered Air Travel Cards that could be used on 17 different airlines.
In recording a purchase, the plate was laid into a recess in the imprinter, with a paper "charge slip" positioned on top of it.
A credit card is different from a charge card, which requires the balance to be repaid in full each month.
In contrast, credit cards allow the consumers to build a continuing balance of debt, subject to interest being charged.
In addition to the main credit card number, credit cards also carry issue and expiration dates (given to the nearest month), as well as extra codes such as issue numbers and security codes.
Not all credit cards have the same sets of extra codes nor do they use the same number of digits.