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  2. List of Unicode characters - Wikipedia

    en.wikipedia.org/wiki/List_of_Unicode_characters

    A numeric character reference refers to a character by its Universal Character Set/Unicode code point, and a character entity reference refers to a character by a predefined name. A numeric character reference uses the format &#nnnn; or &#xhhhh; where nnnn is the code point in decimal form, and hhhh is the code point in hexadecimal form.

  3. Secret Service code name - Wikipedia

    en.wikipedia.org/wiki/Secret_Service_code_name

    The United States Secret Service uses code names for U.S. presidents, first ladies, and other prominent persons and locations. [ 1] The use of such names was originally for security purposes and dates to a time when sensitive electronic communications were not routinely encrypted; today, the names simply serve for purposes of brevity, clarity ...

  4. Codenames (board game) - Wikipedia

    en.wikipedia.org/wiki/Codenames_(board_game)

    Codenames is a 2015 party card game designed by Vlaada Chvátil and published by Czech Games Edition. Two teams compete by each having a "spymaster" give one-word clues that can point to multiple words on the board. The other players on the team attempt to guess their team's words while avoiding the words of the other team.

  5. NATO phonetic alphabet - Wikipedia

    en.wikipedia.org/wiki/NATO_phonetic_alphabet

    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 NATO spelling ...

  6. Huffman coding - Wikipedia

    en.wikipedia.org/wiki/Huffman_coding

    Huffman coding. Huffman tree generated from the exact frequencies of the text "this is an example of a huffman tree". Encoding the sentence with this code requires 135 (or 147) bits, as opposed to 288 (or 180) bits if 36 characters of 8 (or 5) bits were used (This assumes that the code tree structure is known to the decoder and thus does not ...

  7. Mnemonic major system - Wikipedia

    en.wikipedia.org/wiki/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 remembered more easily than ...

  8. Pigpen cipher - Wikipedia

    en.wikipedia.org/wiki/Pigpen_cipher

    The pigpen cipher uses graphical symbols assigned according to a key similar to the above diagram. [1]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.

  9. Code name - Wikipedia

    en.wikipedia.org/wiki/Code_name

    A project code name is a code name (usually a single word, short phrase or acronym) which is given to a project being developed by industry, academia, government, and other concerns. Project code names are typically used for several reasons: To uniquely identify the project within the organization.