Credit cards, as part of the financial industry, use a massive array of jargon. You cant be expected to recognise all these technical terms, and some of them are quite important so heres a quick guide, in alphabetical order.
Affinity card. This is a credit card that gives a certain amount to a charity of your choice, depending on how much you spend. It is generally best to avoid any charity that wants you to sign up for such a card dont let guilt lead you to a high interest rate.
APR. Annual Percentage Rate. This is your overall interest rate, calculated yearly, and given as a percentage of your balance.
ATM. Automated Teller Machine. A cash machine. It will give you money when you put your credit card in, but will probably charge an extra fee.
Balance transfer. This is when you transfer your debt (balance) from one credit card to another. The usual reason for this is to try and keep as much debt as possible on a lower-interest card.
Credit limit. Your credit limit is the maximum amount you can spend or withdraw from your card. Going over your credit limit will result in your card no longer being accepted, and you being charged an over-limit...