Dr. Vannevar Bush and the Differential Analyzer (1931)

The Differential Analyzer was an analog device that was reported to be the most accurate calculating device of its time. The Differential Analyzer was based on metal rods and gears. There were eighteen shafts that ran lengthwise through the machine.

The integrators, input/output tables and multipliers were located along the side of the machine and were connected via a series of cross shafts and metal gears.

Development of the analyzer was started in 1928 and completed by 1931. It was designed to handle sixth-order differential equations.

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