Why Do ATM Pins Have 4 Digits?? And know Interesting Facts About ATM’s

• The ATM pin is 4-digits long as it was the longest string of numbers the inventor's (John Shepherd-Barron)wife could remember.The international standard for PIN management and security in retail banking, allows for PINs from four up to twelve digits
• but also notes that "For usability reasons, an assigned numeric PIN should not exceed six digits in length."Financial PINs are often four-digit numbers, with Switzerland being a notable exception with six-digit PINs being given by default.
• Most ATM and POS software does not support PINs longer than six digits, and many input devices can only accept four digit PINs.
• The first free standing electronic ATM was installed in 1969 by Chemical Bank at its branch in Rockville Centre, New York. This device was the first machine to use the magnetic stripe on plastic cards.
• The first modern electronic ATM was installed in Enfield Town in North London, United Kingdom in 1967 by Barclays Bank. Instead of cash, though, the ATM dispensed vouchers.
• It took China until 1987 to install their first ATM.
• A bank’s ATM averages 7,000 transactions per month
• New ATM technology includes biometric functions that allow customers to be identified by their fingerprints, eyes, face, or voice!