This document defines 21 banking terms including: - 3D Secure which requires online users to provide banking password or PIN to verify transactions. - ATM which stands for automated teller machine, more commonly called a cash machine in the UK. - BACS which is the system banks use to make direct transfers between accounts for debit and credit transfers. - Card security code which is the 3-digit number on credit/debit cards used for online payments. - Mobile banking which refers to checking balances, transferring money or making payments using a mobile device.