Individual banking institutions have their own policies when it comes to credit card applications. Customers may seek either a secured or unsecured credit card, depending on their individual repayment histories (credit rating). A secured credit card requires the applicant to deposit an amount of cash equivalent to the credit limit desired. A deposit of $1500 USD, for example, should be enough to be issued a credit card with a $1000 to $1500 spending limit. If the customer fails to make sufficient payments, the deposited money will be used to satisfy the credit card debt.

An unsecured credit card, on the other hand, is generally issued to those who have a good credit history and have demonstrated an ability to repay the accrued debt on time. Credit limits are determined on an individual basis, and may be raised or lowered based on performance. An unsecured credit card is essentially a pre-approved loan, with interest rates higher than a similar personal bank loan. The main benefit of any credit card is instant access to more cash than you may have on hand. A recent college graduate, for example, may have to purchase a business suit for employment purposes. Earning the $200+ USD needed for an average suit could take weeks, and he or she needs the suit in order to earn the income. Putting the suit on a credit card would be the ideal solution; the borrower could repay the balance with his or her first paycheck and few interest charges would accrue.

Credit card use often becomes problematic when the holder accrues more debt than a regular monthly payment can cover. The issuing bank does allow credit card users to carry over balances every month (revolving credit), but significant interest rates may also accrue on those balances. Missing a scheduled payment can also prompt the bank to raise interest rates on a delinquent account. If a credit card holder can only afford to pay the minimal amount due every month, he or she will not be reducing the actual debt incurred. The minimal payments may only apply to the accrued interest. This is a financial spiral many credit card users may experience if they don’t use proper spending restraint.

A credit card does give the holder an immediate credibility for services such as hotel reservations, car rentals and airline ticket reservations. Those without a credit card often have to guarantee their reservations with cash deposits or several forms of identification. Many credit card plans also include insurance coverage for theft or fraud. If a credit card is reported stolen and then used illegally, the cardholder would not be held responsible for unauthorized charges. A credit card holder can authorize other people to use the card for purchases or services, however. Ultimately, the primary cardholder is responsible for all charges placed on his or her account.

It’s true that credit cards have become important sources of identification — if you want to rent a car, for example, you really need a major credit card. And used wisely, a credit card can provide convenience and allow you to make purchases with nearly a month to pay for them before finance charges kick in.

That sounds good, in theory. But in reality, many consumers are unable to take advantage of these benefits because they carry a balance on their credit card from month to month, paying finance charges that can go up to a whopping 23 percent. Many find it hard to resist using the old “plastic” for impulse purchases or buying things they really can’t afford. The numbers are striking: In 1999, American consumers charged about $1.2 trillion on their general-purpose credit cards.

In this article we’ll look at the credit card — how it works both financially and technically and we’ll offer tips on how to shop for a credit card. (Experts say this should be a project on the scale of shopping for a car loan or mortgage!) We’ll also describe the different credit-card plans available, talk about your credit history and how that might affect your card options, and discuss how to avoid credit-card fraud — both online and in the real world.

Let’s start at the beginning. A credit card is a thin plastic card, usually 3-1/8 inches by 2-1/8 inches in size, that contains identification information such as a signature or picture, and authorizes the person named on it to charge purchases or services to his account — charges for which he will be billed periodically. Today, the information on the card is read by automated teller machines (ATMs), store readers, and bank and Internet computers.

According to Encyclopedia Britannica, the use of credit cards originated in the United States during the 1920s, when individual companies, such as hotel chains and oil companies, began issuing them to customers for purchases made at those businesses. This use increased significantly after World War II.

­The first universal credit card — one that could be used at a variety of stores and businesses — was introduced by Diners Club, Inc., in 1950. With this system, the credit-card company charged cardholders an annual fee and billed them on a monthly or yearly basis. Another major universal card — “Don’t leave home without it!” — was established in 1958 by the American Express company.

Later came the bank credit-card system. Under this plan, the bank credits the account of the merchant as sales slips are received (this means merchants are paid quickly — something they love!) and assembles charges to be billed to the cardholder at the end of the billing period. The cardholder, in turn, pays the bank either the entire balance or in monthly installments with interest (sometimes called carrying charges).

The first national bank plan was Bank Americard, which was started on a statewide basis in 1959 by the Bank of America in California. This system was licensed in other states starting in 1966, and was renamed Visa in 1976.

Other major bank cards followed, including MasterCard, formerly Master Charge. In order to offer expanded services, such as meals and lodging, many smaller banks that earlier offered credit cards on a local or regional basis formed relationships with large national or international banks.