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  2. Unicode subscripts and superscripts - Wikipedia

    en.wikipedia.org/wiki/Unicode_subscripts_and...

    The intended use [2] when these characters were added to Unicode was to produce true superscripts and subscripts so that chemical and algebraic formulas could be written without markup. Thus "H₂O" (using a subscript 2 character) is supposed to be identical to "H 2 O" (with subscript markup).

  3. English alphabet - Wikipedia

    en.wikipedia.org/wiki/English_alphabet

    [citation needed] Additionally, the v–v or u-u ligature double-u (W w) was in use. In the year 1011, a monk named Byrhtferð recorded the traditional order of the Old English alphabet. [ 2 ] He listed the 24 letters of the Latin alphabet first, including the ampersand , then 5 additional English letters, starting with the Tironian note ond ...

  4. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    If y is a variable that depends on x, then , read as "d y over d x" (commonly shortened to "d y d x"), is the derivative of y with respect to x. 2. If f is a function of a single variable x , then d f d x {\displaystyle \textstyle {\frac {\mathrm {d} f}{\mathrm {d} x}}} is the derivative of f , and d f d x ( a ) {\displaystyle \textstyle {\frac ...

  5. Scrabble letter distributions - Wikipedia

    en.wikipedia.org/wiki/Scrabble_letter_distributions

    You can still use a blank as a Q, W, X or Y, but not as DZ or DZS. Using a D tile and a Z tile to make DZ or putting together D, Z and S or D and ZS to make DZS is not allowed, meaning words with these two letters are simply not playable. Using a blank (as Y) in front of G, L, N or T to make GY, LY, NY or TY is also not allowed. [citation needed]

  6. 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 ...

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    You can find instant answers on our AOL Mail help page. Should you need additional assistance we have experts available around the clock at 800-730-2563. Should you need additional assistance we have experts available around the clock at 800-730-2563.

  8. English orthography - Wikipedia

    en.wikipedia.org/wiki/English_orthography

    Here, the spelling - s is pronounced either /s/ or /z/ (depending on the environment, e.g., tats / ˈ t æ t s / and tails / ˈ tl z /) while - es is usually pronounced /ᵻz/ [a] (e.g. classes /ˈklæsᵻz/).

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