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Gray's Printing Telegraph
The printing telegraph was Gray's most successful invention in the late 1800s. Imagine the excitement this machine caused because it was no longer necessary for a telegraph operator to interpret the code and write the text. (Image courtesy of Graybar.)
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Copyright © 1981-2010 by Computer Language Company Inc. All rights reserved.
All other reproduction is strictly prohibited without permission from the publisher.
Copyright © 1981-2010 by Computer Language Company Inc. All rights reserved.
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