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ATM
1. An automated teller machine (ATM), also known as automatic banking machine (ABM), Cash Machine, or Cashpoint, is a computerised telecommunications device that provides the clients of a financial institution with access to financial transactions in a public space without the need for a cashier, human clerk or bank teller.
2. On most modern ATMs, the customer is identified by inserting a plastic ATM card with a magnetic stripe or a plastic smart card with a chip, that contains a unique card number and some security information such as an expiration date.
3. Authentication is provided by the customer entering a personal identification number (PIN).