Harvard Mark I
![](https://upload.wikimedia.org/wikipedia/commons/thumb/1/11/Harvard_Mark_I_Computer_-_Left_Segment.jpg/280px-Harvard_Mark_I_Computer_-_Left_Segment.jpg)
![](https://upload.wikimedia.org/wikipedia/commons/thumb/0/07/Harvard_Mark_I_Computer_-_Input-Output_Details.jpg/280px-Harvard_Mark_I_Computer_-_Input-Output_Details.jpg)
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