An IEEE Spectrum story from David Brock:

The Shocking Truth Behind Arnold Nordsieck’s Differential Analyzer

To program this electromechanical computer, you plugged in the cords in specific patterns—and with extreme caution

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Brian A. Berg / bberg@StanfordAlumni.org
Berg Software Design
14500 Big Basin Way, Suite F, Saratoga, CA 95070 USA
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IEEE Milestone Coordinator for Region 6
IEEE SCV Section Past Chair / IEEE-CNSV Board Director