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  2. Postal Index Number - Wikipedia

    en.wikipedia.org/wiki/Postal_Index_Number

    2-digit postcode areas in India (defined through the first two PIN digits) The third digit of a PIN, combined with the first two digits, represents a specific geographical region (except in the case of the functional zone for the Army) called a sorting district that is headquartered at the main post office of the largest city in the region and ...

  3. Personal identification number - Wikipedia

    en.wikipedia.org/wiki/Personal_identification_number

    A personal identification number ( PIN ), PIN code, or sometimes redundantly a PIN number, is a numeric (sometimes alpha-numeric) passcode used in the process of authenticating a user accessing a system. The PIN has been the key to facilitating the private data exchange between different data-processing centers in computer networks for ...

  4. Chudnovsky algorithm - Wikipedia

    en.wikipedia.org/wiki/Chudnovsky_algorithm

    Chudnovsky algorithm. The Chudnovsky algorithm is a fast method for calculating the digits of π, based on Ramanujan 's π formulae. Published by the Chudnovsky brothers in 1988, [ 1] it was used to calculate π to a billion decimal places. [ 2]

  5. Pi - Wikipedia

    en.wikipedia.org/wiki/Pi

    The record for memorizing digits of π, certified by Guinness World Records, is 70,000 digits, recited in India by Rajveer Meena in 9 hours and 27 minutes on 21 March 2015. [203] In 2006, Akira Haraguchi , a retired Japanese engineer, claimed to have recited 100,000 decimal places, but the claim was not verified by Guinness World Records.

  6. A New Formula for Pi Is Here. And It’s Pushing Scientific ...

    www.aol.com/lifestyle/formula-pi-pushing...

    The digits of pi extend into infinity, and pi is itself an irrational number, meaning it can’t be truly represented by an integer fraction (the one we often learn in school, 22/7, is not very ...

  7. List of ISO 3166 country codes - Wikipedia

    en.wikipedia.org/wiki/List_of_ISO_3166_country_codes

    See the ISO 3166-3 standard for former country codes. British Virgin Islands – See Virgin Islands (British) . Burma – See Myanmar . Cape Verde – See Cabo Verde . Caribbean Netherlands – See Bonaire, Sint Eustatius and Saba . China, The Republic of – See Taiwan (Province of China) . Democratic People's Republic of Korea – See Korea ...

  8. What’s a Personal Identification Number (PIN) - AOL

    www.aol.com/finance/personal-identification...

    This numeric code, which typically consists of four digits, provides additional security within the electronic transaction process. ... An individual’s PIN is the four-digit code they set after ...

  9. India Post - Wikipedia

    en.wikipedia.org/wiki/India_Post

    A Post Box of India Post A special stamp released on India Post Payments Bank in 2017. The Postal Index Number (PIN, or sometimes redundantly PIN code) is a six-digit postal code. The PIN system was made by Shriram Bhikaji Velankar when he was at service in Kolkata. It was introduced on 15 August 1972 by former Prime Minister Indira Gandhi.