How is a line of credit issued by a bank similar to a credit card?

Question:

How is a issued by a bank similar to a credit card?
Line of Credit
A line of credit (LOC) is a preset borrowing limit that can be used at any time. The borrower can take money out as needed until the limit is reached, and as money is repaid, it can be borrowed again in the case of an open line of credit. A LOC is...