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Apple's history is hiding in a Mac font
FireWire, the Newton PDA, and other technologies from Apple's past are still hiding in macOS.
You can't even (natively) run games or applications more than a few years old on a modern Mac, so finding components undisturbed for decades is a rarity. Even though PowerPC was not widely used in desktop computers outside of Apple products, it found some success in game consoles like the Wii and PS3, and it powered the Curiosity and Perseverance rovers on Mars. One more interesting group of icons to highlight: there are some symbols for monitor output and adjustment, including one for degaussing a CRT screen as a magnet with a cross through it.
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