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This Clock Made Power Grids Possible

Cars That Think

The 60-hertz standard (or 50 hertz in most of the rest of the world) is taken for granted today, but in the early days of electrification—before the invention of the master station clock—the standard was seldom standard. The black hand is connected to a standard mechanical pendulum clock; the gold hand is driven by a synchronous motor.

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Xerox Parc’s Engineers on How They Invented the Future—and How Xerox Lost It

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A high-speed network that connects computers, printers, and other peripherals in an office or building. described the design of lnterpress, a printing protocol: “One of the designers was in Pittsburgh, one of them was in Philadelphia, there were three of us in this area, and a couple in El Segundo [Calif.]. Local area network.

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When New York City Was a Wiretapper’s Dream

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The connections blanketed an area of Manhattan running from East 38th Street to East 96th Street, a swath of the city’s most expensive real estate. Some—like the burlesque artist Ann Corio , whose phone conversations were recorded in a dragnet search for incriminating information on prominent midtown residents—were the targets of blackmail.