MasterCard is a multinational corporation based in Purchase, NY in the United States. Throughout the world, its principal business is to process payments between the banks of merchants and the banks of purchasers that use its "Mastercard" branded debit- and credit cards to make purchases.
	A charge card is a means of obtaining a very short term (usually around 1 month) loan for a purchase. It is similar to a credit card, except that the contract with the card issuer requires that the cardholder must each month pay charges made to it in full, there is no "minimum payment" other than the full balance.
	Discover Card is one of the four major credit card brands issued primarily worldwide, with over 50 million cardholders. Most cards with the Discover brand are issued by Discover Bank. Discover Card transactions are processed through the Discover Network payment network.
	Charge card is a payment card with a preset limit that can be used to make payments for goods and services at participating merchants either locally or internationally. Examples of charge cards are American Express and Diners Club International.
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