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    Very cool! One small nit: I would love to be able to see the date I’m at while I’m sliding the slider and looking at the symbols.

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      Added. That is better, thanks!

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      What’s the source for dates for the non-mathematical symbols?

      Quite a few symbols ‘invented’ between the year -2000 and -1999 using the slider :P

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        The Wikipedia links attached to each key. But it’s pretty loosely goosey. Some letters have origins in Egypt, some Greece, some forms were refined in England millennium later. I just roughly grabbed the earliest range I saw. For ancient letters I used the -2000 cutoff. I should probably switch to a range of uncertainty for each. The range narrows greatly as you move closer to the present day.

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        This is awfully awfully cool!

        Slight bug report: Only a few of the latter F1-F12 function keys actually map to the function keys article.

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          Thanks!

          Slight bug report: Only a few of the latter F1-F12 function keys actually map to the function keys article.

          That probably was just a result of my rushed implementation. Each key actually has child elements that you need to click on. If I had more time I’d do a little cleanup of the Apple CSS Keyboard I’m using. For now I just quickly made the whole key clickable via some Javascript duct tape :). Thanks for the report!

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          Pretty cool. The Apple keyboard is a quite odd choice.

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            Not really that odd if you think about it ;^)

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            It would have been a great idea if the information wasn’t all over the shop, i.e. W:

            It was probably considered a separate letter by the 14th century in both Middle English and Middle German orthography, although it remained an outsider, not really considered part of the Latin alphabet proper, as expressed by Valentin Ickelshamer in the 16th century, […]

            How is it over 1300 years old then?

            Also, what are you actually dating? Approximate representation of a phoneme/sound in a specific language? Grapheme? Is it the first occurance of the ligature in a specific language? Or is it an actual letter?

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              I agree it would be better with a stronger dataset :). I tried to find a reasonable estimate for each symbol at a high average rate of ~2 minutes or less per symbol. Perhaps this will morph into part of some larger related dataset someday, but it was fun to get something out quick and dirty.

              How is it over 1300 years old then?

              For “W” my guess is I went with this: “The Germanic /w/ phoneme was therefore written as ⟨VV⟩ or ⟨uu⟩ (⟨u⟩ and ⟨v⟩ becoming distinct only by the Early Modern period) by the earliest writers of Old English and Old High German, in the 7th or 8th centuries”

              Also, what are you actually dating? Approximate representation of a phoneme/sound in a specific language? Grapheme? Is it the first occurance of the ligature in a specific language? Or is it an actual letter?

              In this first pass I aimed for what I would say are the first use of the particular symbol which is either identical or strongly correlated with the symbol now present on the keyboard. Though I had a hard limit on time spent researching each symbol for the first pass so some of them could be wildly off.