Date: | 1950 |
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Description: | Jean Hoffman looks over a printed circuit board in the foreground, with a map of Madison, Wisconsin on the wall behind her. |
Date: | |
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Description: | Man wearing microphone and headphones seated before a radar screen. |
Date: | 1950 |
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Description: | Shirley Jeffrey standing and watching an automatic projector which accompanied an exhibit. The projector was adapted by Harry Lichter of the museum staff. ... |
Date: | 1940 |
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Description: | Two men are standing near a car, with the man on the right wearing a police uniform. A wired device is sitting on the hood of the car and both men are look... |
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