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  2. Phoneword - Wikipedia

    en.wikipedia.org/wiki/Phoneword

    Phoneword. Many telephone keypads have letters with the numbers, from which words can be formed. Sign in Argentina giving the number 0800 555 8736 as 0800 555 TREN. Phonewords are mnemonic phrases represented as alphanumeric equivalents of a telephone number. [1] In many countries, the digits on the telephone keypad also have letters assigned.

  3. Telephone keypad - Wikipedia

    en.wikipedia.org/wiki/Telephone_keypad

    The official toll-free hotline for the California Department of Transportation's Adopt-a-Highway program is 1-866-236-7824, but signs advertise the number as 1-866-ADOPTAHWY, with two extra digits, for memorability. The letters have also been used, mainly in the United States, as a technique for remembering telephone numbers easily.

  4. Mnemonic major system - Wikipedia

    en.wikipedia.org/wiki/Mnemonic_major_system

    Numzi also has an iOS app which is a portable Major System number-word converter. 2Know is free Windows software for converting numbers to words (English, German, French). Mnemisis Another free mnemonic program - runs on Linux, Mac OS X, and Windows; Memagine iPhone app that uses the system to teach how to recall a list of up to 100 items in ...

  5. Telephone exchange names - Wikipedia

    en.wikipedia.org/wiki/Telephone_exchange_names

    Telephone numbers listed in 1920 in New York City having three-letter exchange prefixes. In the United States, the most-populous cities, such as New York City, Philadelphia, Boston, and Chicago, initially implemented dial service with telephone numbers consisting of three letters and four digits (3L-4N) according to a system developed by W. G. Blauvelt of AT&T in 1917. [1]

  6. Nihilist cipher - Wikipedia

    en.wikipedia.org/wiki/Nihilist_cipher

    Nihilist cipher. In the history of cryptography, the Nihilist cipher is a manually operated symmetric encryption cipher, originally used by Russian Nihilists in the 1880s to organize terrorism against the tsarist regime. The term is sometimes extended to several improved algorithms used much later for communication by the First Chief ...

  7. Multi-tap - Wikipedia

    en.wikipedia.org/wiki/Multi-tap

    Multi-tap. An E.161 standard modern telephone keypad, as used for text messaging. Multi-tap ( multi-press) [1] refers to a text entry system for mobile phones. The alphabet is printed under each key (beginning on "2") in a three-letter sequence as follows; ABC under 2 key, DEF under 3 key, etc. Exceptions are the "7" key, which adds a letter ...

  8. List of country calling codes - Wikipedia

    en.wikipedia.org/wiki/List_of_country_calling_codes

    Worldwide distribution of country calling codes. Regions are coloured by first digit. Country calling codes, country dial-in codes, international subscriber dialing (ISD) codes, or most commonly, telephone country codes are telephone number prefixes for reaching telephone subscribers in foreign countries or areas via international telecommunication networks.

  9. 867-5309/Jenny - Wikipedia

    en.wikipedia.org/wiki/867-5309/Jenny

    867-5309/Jenny. " 867-5309/Jenny " is a song written by Alex Call and Jim Keller and performed by Tommy Tutone that was released on the album Tommy Tutone 2 (1981) through Columbia Records. It peaked at number four on the Billboard Hot 100 and number one on the Rock Top Tracks chart in April 1982. The song led to a fad of people prank calling ...

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