Debit Card or Credit Card?

What's the difference between a debit card and a credit card?
While a debit card looks like a credit card, it works more like cash or a personal check. You "pay now." With a credit card, you "pay later."
Debit means "subtract." When you use a debit card, you subtract money from your own checking or savings account. As with credit cards, you use it in stores for purchases. At check-out, the card reader electronically contacts your bank and subtracts the amount from your account. The money you have in your bank account limits how much you can spend. However, if you are not careful in watching your daily account balance, you can over withdraw your account. Some systems will allow you to use your debit card when you don't have enough money in your account to cover the purchase. This can result in hefty overdraft fees.
Using a credit card is somewhat like taking out a loan from a bank or other financial institution. You have to pay back the credit you used each month. If you pay back less than the full amount you owe each month, you pay interest on the amount you don't pay back. The credit card company sets the total amount you can charge based on your credit history, income, debts and ability to pay.
Some cards are dual-purpose credit/debit cards. Before you swipe the card through the reader, you select a "credit" or "debit" button on the reader. If you select "debit," you then enter your Personal Identification Number (PIN).
If you select "credit," you are given a credit receipt to sign. "Credit" charges will appear on your next charge account bill.