Interesting Fact Behind Keeping Atm Pin Of 4 Digit

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In the era of technology, you too use the ATMs. Now, if you use ATMs, you will also be aware that PIN of ATM is of 4 digits. But have you ever thought why PIN is always consist of 4 digit? 

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Let's tell you why this is so, actually a very shocking but very genuine reason behind it is hidden. It happened because the ATM was invented by John Adrian Shepherd-Baron. Earlier, he had proposed a six-digit password to keep the transaction safe from ATM but he had to withdraw the offer due to his wife.

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Actually his wife Carolyn told him that he could remember only the maximum number of four digits. If this number is longer than that, then they have trouble remembering it. And Baron said that he can not see his wife troubled in any situation. That's why the ATM password was kept at 4 digits.