Stephen Wolfram quote ✍️

Quote

Well, the first thing to say is that we've worked hard to maintain compatibility, so that any program written with an earlier version of Mathematica can run without change in 3.0, and any notebook can be converted.
Hippy musical
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Hint 1 meaning
A slender outgrowth from the chitinous cuticle of insects, spiders, crustaceans, and other invertebrates. Such hairs are totally unlike those of vertebrates in structure, composition, and mode of growth.
Hint 2 anagram
AIRH
Hint 3 another clue
Coat
7 +1

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