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Radio Propagation


Solar X-rays:
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Geomagnetic field:
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D-Region Absorption
Prediction:
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Created by PA4RM

The lead developer of the bar code system that became the now-ubiquitous Universal Product Code (UPC), George Laurer, K4HZE, of Wendell, North Carolina, died on December 5. He was 94. While an electrical engineer with IBM in North Carolina’s Research Triangle Park in the early 1970s, Laurer led the effort to develop the bar code system. The UPC, composed of 30 unique black bars and a 12-digit n...

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