Thanks popilin, even I can understand that. ♫ ♥
There's some odd choices of characters there. What use are half a dozen random fractions like ⅝? Maybe somebody did a poll and decided they were the 6 most popular fractions on the interweb.
More likely they assigned codes for every conceivably useful character they could think of, then it came down to: "OK guys, there's still 57 codes with no symbols assigned. Think of something, anything. We need to get this list finished, dammit!".
Hey, Cal's alt codes work too! ☻