2008 song about the Apple key by Hot Lava: https://www.youtube.com/watch?v=ts3tLs6xB1U
Also Alt-J, whose logo Δ can be obtained by pressing alt+j on a Mac:
https://en.wikipedia.org/wiki/Alt-J
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Also Alt-J, whose logo Δ can be obtained by pressing alt+j on a Mac:
https://en.wikipedia.org/wiki/Alt-J