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San Francisco’s first tech boom wasn’t about silicon, but steel. Steel cable that triggered a revolution in urban transportation. Scotsman Andrew S. Hallidie, an experienced maker of wire rope (steel cable), employed his expertise to invent the cable car on Clay Street in San Francisco, with the first run on August 2, 1873. Hallidie said he wanted to surmount hills in the City too steep for horse-drawn streetcars.

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