KarTrak, a bar code system designed to automatically identify rail cars (en.wikipedia.org) 11 points by rusew 11y ago ↗ HN
[–] mrow84 11y ago ↗ This video about the Bus Electronic Scanning Indicator, from the late 1950's, might be of interest as well: https://www.youtube.com/watch?v=qGwZwe6izTg
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