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  2. Letter frequency - Wikipedia

    en.wikipedia.org/wiki/Letter_frequency

    The California Job Case was a compartmentalized box for printing in the 19th century, sizes corresponding to the commonality of letters. The frequency of letters in text has been studied for use in cryptanalysis, and frequency analysis in particular, dating back to the Arab mathematician al-Kindi (c. AD 801–873 ), who formally developed the method (the ciphers breakable by this technique go ...

  3. IPA vowel chart with audio - Wikipedia

    en.wikipedia.org/wiki/IPA_vowel_chart_with_audio

    This chart provides audio examples for phonetic vowel symbols. The symbols shown include those in the International Phonetic Alphabet (IPA) and added material. The chart is based on the official IPA vowel chart. [1] The International Phonetic Alphabet is an alphabetic system of phonetic notation based primarily on the Latin alphabet.

  4. International Phonetic Alphabet - Wikipedia

    en.wikipedia.org/.../International_Phonetic_Alphabet

    The official summary chart of the IPA, revised in 2020. The International Phonetic Alphabet (IPA) is an alphabetic system of phonetic notation based primarily on the Latin script. It was devised by the International Phonetic Association in the late 19th century as a standard written representation for the sounds of speech. [1]

  5. Comparison of ASCII encodings of the International Phonetic ...

    en.wikipedia.org/wiki/Comparison_of_ASCII...

    Only the symbols in the latest IPA chart are included. The numbers in the leftmost column, according to which the symbols are sorted, are the IPA Numbers.Some of the IPA symbols to which a system lacks a corresponding symbol may still be represented in that system by use of a modifier (diacritic), but such combinations are not included unless the documentation explicitly assigns one for the value.

  6. Academic grading in the United States - Wikipedia

    en.wikipedia.org/wiki/Academic_grading_in_the...

    The top grade, A, is given here for performance that exceeds the mean by more than 1.5 standard deviations, a B for performance between 0.5 and 1.5 standard deviations above the mean, and so on. [17] Regardless of the absolute performance of the students, the best score in the group receives a top grade and the worst score receives a failing grade.

  7. Morse code mnemonics - Wikipedia

    en.wikipedia.org/wiki/Morse_code_mnemonics

    For a letter in the alphabet, the associated word will usually begin with the same letter. In that word, tall letters (those descending below the baseline or ascending above the mean line – b, d, f, g, h, j, k, l, p, q, t, or y) and capital letters represent dashes, while short letters (aceimnorsuvwxz) represent dots.

  8. Scrabble letter distributions - Wikipedia

    en.wikipedia.org/wiki/Scrabble_letter_distributions

    The letter X is also only used in loanwords, but it is not so rare, so it is included. The digraphs CH, DZ, and DŽ, although considered single letters in the Slovak alphabet, are played as pairs of letters. Since 2013, a new 112-tile set was introduced, including the letters Q and W: 2 blank tiles (scoring 0 points)

  9. Academic grading in Canada - Wikipedia

    en.wikipedia.org/wiki/Academic_grading_in_Canada

    In addition to letter grades and percentages, the Ministry of Education also uses a level system to mark its students. The four levels correspond to how students are marked on the Ontario rubric. The following is the levels on the Ontario rubric, its meaning, and its corresponding letter/percentage grades: