An ATM card is a small plastic card which enables you to draw out money from your bank account. This card is slim and light weight so that it can be stored in your wallet, but it contains a lot of important information, so it is crucial to take care of it.
ATM stands for Automated Teller Machine. An ATM is also know as a cash machine. It is automated, which means that you just punch in your identifying numbers and your balance will appear automatically on the screen and any money that you request will be automatically dispensed, as long as you have enough money in your bank account.
The ‘teller’ part refers to the teller in a bank who was traditionally a human being who counted out money and performed other financial services for customers of the bank. So, an ATM can be considered to be a mechanized version of this human being.