A number that must be entered by the client before an ATM will enable access to the client’s financial balances. Additionally utilized at a retail foundation when a client pays for a buy with an ATM or online charge card. A numeric code utilized as the check to finish an exchange by means of an installment card. The number is gone into a keypad and is encoded to go alongside the authorization. A number utilized as a security get to the code for telephone saving money and to pull back cash from an ATM or by means of EFTPOS.