Atanasoff-Berry add-subtract module (reconstruction)

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Date Introduced
1996 ca.
Photographer
Richards, Mark
Dimensions
overall: 4 3/4 in x 7 in x 5 in
Manufacturer
Iowa State University
Credit Line
Courtesy of John Gustafson
Copyright Owner
© Mark Richards
Location
United States
Object ID
102624592

The ABC used 30 add-subtract circuits for solving equations. When this reconstruction was built, it was found that the resistors had to be hand-selected to work correctly.