Smart Credit Cards – A smart card is a card that has a small computer chip embedded in it. Such cards can store immensely more information than the magnetic strip on the back of a standard credit card. They can also interact with a central computer to change that information whenever you undertake a transaction. Card issuers now have smart credit cards that are "pre-approved" for a certain number of transactions and a certain amount of credit. Each time you use such a card, the merchant's reader updates the amount of credit and number of pre-approved transactions remaining. The advantage of such cards is that merchants do not need to use the credit-card network to get approval for pre-approved transactions. Electronic Purses >>>