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  2. Mnemonic major system - Wikipedia

    en.wikipedia.org/wiki/Mnemonic_major_system

    Mnemonic major system. The major system (also called the phonetic number system, phonetic mnemonic system, or Herigone's mnemonic system) is a mnemonic technique used to help in memorizing numbers. The system works by converting numbers into consonants, then into words by adding vowels. The system works on the principle that images can be ...

  3. ARPABET - Wikipedia

    en.wikipedia.org/wiki/Arpabet

    ARPABET (also spelled ARPAbet) is a set of phonetic transcription codes developed by Advanced Research Projects Agency (ARPA) as a part of their Speech Understanding Research project in the 1970s. It represents phonemes and allophones of General American English with distinct sequences of ASCII characters.

  4. NATO phonetic alphabet - Wikipedia

    en.wikipedia.org/wiki/NATO_phonetic_alphabet

    See media help. The International Radiotelephony Spelling Alphabet or simply Radiotelephony Spelling Alphabet, commonly known as the NATO phonetic alphabet, is the most widely used set of clear-code words for communicating the letters of the Roman alphabet. Technically a radiotelephonic spelling alphabet, it goes by various names, including ...

  5. Pigpen cipher - Wikipedia

    en.wikipedia.org/wiki/Pigpen_cipher

    The pigpen cipher (alternatively referred to as the masonic cipher, Freemason's cipher, Rosicrucian cipher, Napoleon cipher, and tic-tac-toe cipher) [2] [3] is a geometric simple substitution cipher, which exchanges letters for symbols which are fragments of a grid. The example key shows one way the letters can be assigned to the grid.

  6. Morse code - Wikipedia

    en.wikipedia.org/wiki/Morse_code

    Morse code is a method used in telecommunication to encode text characters as standardized sequences of two different signal durations, called dots and dashes, or dits and dahs. [3] [4] Morse code is named after Samuel Morse, one of the early developers of the system adopted for electrical telegraphy . International Morse code encodes the 26 ...

  7. Attic numerals - Wikipedia

    en.wikipedia.org/wiki/Attic_numerals

    The Attic numerals were a decimal (base 10) system, like the older Egyptian and the later Etruscan, Roman, and Hindu-Arabic systems. Namely, the number to be represented was broken down into simple multiples (1 to 9) of powers of ten — units, tens, hundred, thousands, etc.. Then these parts were written down in sequence, in order of ...

  8. Braille - Wikipedia

    en.wikipedia.org/wiki/Braille

    With the letter ⠍ m, the resulting word is ⠐ ⠍ mother. There are also ligatures ("contracted" letters), which are single letters in braille but correspond to more than one letter in print. The letter ⠯ and, for example, is used to write words with the sequence a-n-d in them, such as ⠛ ⠗ ⠯ grand.

  9. Kaktovik numerals - Wikipedia

    en.wikipedia.org/wiki/Kaktovik_numerals

    The Kaktovik numerals or Kaktovik Iñupiaq numerals [1] are a base-20 system of numerical digits created by Alaskan Iñupiat. They are visually iconic, with shapes that indicate the number being represented. The Iñupiaq language has a base-20 numeral system, as do the other Eskimo–Aleut languages of Alaska and Canada (and formerly Greenland).