An Automated Teller Machine (ATM) is a machine that allows people to access their bank accounts and perform various financial transactions without needing a bank teller. Users can withdraw cash, deposit money, check their account balances, and transfer funds between accounts. ATMs are typically available 24/7, providing convenience for customers. To use an ATM, a person inserts their bank card and enters a personal identification number (PIN). The machine then connects to the bank's network to process the transaction. ATMs are commonly found in public places such as shopping centers, airports, and convenience stores, making banking accessible to everyone.