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Before the solid-state transistors & integrated circuits that gave it the name "Silicon" Valley, that region was a locus of innovation in glass vacuum tubes, the key mid-20th-century tech for radios, televisions, guidance & control, electronic warfare, radar, & early computers.
More on the glass-centric theory of historyhttps://www.amazon.com/Glass-World-History-Alan-Macfarlane/dp/0226500284 …
maybe 'silica valley' is more appropriate?
Or maybe wine-centric. In vino veritas.
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