Automated teller machines, or ATMs, are electronic devices that allow people to perform banking transactions without the need for a human teller. Users can withdraw cash, check account balances, deposit money, and transfer funds using a debit or credit card. ATMs are commonly found in various locations, such as banks, shopping centers, and airports. To use an ATM, a person inserts their card and enters a personal identification number (PIN) for security. The machine then connects to the bank's network to process the transaction. ATMs provide convenience and accessibility, allowing customers to manage their finances 24/7.