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Xerox PARC — the Palo Alto Research Center — is another place that causes despair among those who fund pure research. The quantity and quality of its inventions during its heyday are unmatched: Ethernet, the laser printer, colour computer graphics, graphical user interfaces, Wysiwyg word processing, use of the mouse, object-oriented programming — and are behind most of what we do on our desktops these days. Yet, famously, Xerox found it impossible to make any money at it, or at least anywhere near as much as everyone else did.
Real life visiting potential: 3/10. Occasional talks open to the public, but most of the site is firmly off-limits.