ATMs allow bank account holders to access their accounts and perform transactions without interacting with bank staff. An ATM uses a customer's plastic card with a magnetic strip containing their account information to identify them. The first ATM was installed in London in 1967. There are now over 1.8 million ATMs globally. ATMs provide convenience for customers as they offer 24/7 access to accounts and can be found in many public locations. However, they also pose security risks if cards are stolen and fees are sometimes charged. An ATM consists of components like a CPU, magnetic card reader, display, function keys and vault to control transactions securely.