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System/360 Model 91

 
 
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System/360 Model 91
 
Flanked by a display console with an array of lights and switches, an operator uses a monitor to check the performance of the Model 91. This System/360 installed at NASA's Goddard Space Flight Center in Greenbelt, Md., was, in 1968, the most powerful computer in operation. It could perform up to 16.6 million additions a second.
 
 
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