An ATM card (also known as a bank card, client card, key card, or cash card) is a card issued by a bank, credit union, or building society that can be used in an Automated Teller Machine (ATM) for transactions such as: deposits, withdrawals, account information, and other types of transactions, often through interbank networks.

It can also be used on improvised ATMs, such as merchants' card terminals that deliver ATM features without any cash drawer (commonly referred to as mini ATMs). These terminals can also be used as Cashless scrip ATMs by cashing the fund transfer receipt at the merchant's Cashier.

ATM cards are typically about 86 × 54 mm, i.e. ISO/IEC 7810 ID-1 size.

Similar to the size of an Credit Card, Debit Card, and so on.

Some ATM cards can also be used:

Unlike an offline debit card that is signature based, in-store purchases or refunds with an ATM card require authentication through a Personal Identification Number (PIN), similar to an online debit card that is also PIN based. This means that ATM cards cannot be used at merchants that are without a direct connection to an interbank network.

ATM or atm is an abbreviation which may refer to:

Card (from Greek χάρτης - chartēs, "paper, papyrus") primarily refers to an entire or piece of card stock.

Card may refer to:

, in mathematical notation, a function that returns the cardinality of a set

The Card may refer to: