However, it was only in 1970 that the magnetic strip was used on credit cards.A credit card falls under the category of plastic money. Here the card issuer, i.e. the bank, issues a card to the customer i.e. the cardholder. The issuer of the card provides its customer with a line of credit. The line of credit is the amount of credit a customer is eligible for to pay to merchants or even as a cash advance. A credit card differs from the normal debit/charge card in the sense that a credit card does not require a complete payment at the end of the month. Instead, it allows customers to ‘revolve’ the balance, by charging them with an interest instead. Several different card issuers provide these cards to the customers. A few of the well-known card issuers in the United States are: Capital One Credit Cards, Discover Cards, HSBC Bank Credit Card, American Express Cards, Chase, Advanta, Master Card, Bank of America, Citi Credit Cards, First Premier Cards, VISA, etc.With the increasing growth of credit cards in the current world, it is important to understand what credit cards are and how they work. This report focuses on understanding the basics of credit cards and the various aspects of credit cards, like the interest, benefits, eligibility criteria, etc.United States provides individuals with credit cards based entirely on the credit history of the individual. An individual with a positive history is most likely to receive a credit card. One of the biggest credits – checking company in the US is called EQUIFAX. This company provides for all details of the financial standing of individuals i.e. the repayments history, timeliness in paying bills, etc. Apart from a good credit history, it is also very important for individuals to have a social security number as this number acts as identification for all. Also, primary identification like the passport is needed.