An ABM (Automated Banking Machine) and an ATM (Automated Teller Machine) are essentially the same thing. The term "ABM" is more commonly used in Canada, while "ATM" is prevalent in the United States and is also widely used in Canada.
In more detail:
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ATM (Automated Teller Machine): This is the globally recognized and more commonly used term, especially in the United States.
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ABM (Automated Banking Machine): Primarily used in Canada, although ATM is also very common there. It's simply a different name for the same technology.
Therefore, you can think of them as synonyms referring to the same self-service banking device that allows customers to perform transactions like withdrawing cash, depositing funds, checking balances, and transferring money without the need for a human teller.