I am reading "Revolutionary Technology: an introduction to the video and digital audio disc" by David K. Matthewson.
I was surprised to learn about the following! In the mid-1970s, an American company called I/O Metric Corporation created videodiscs which could be reproduced photographically:
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The author says it demonstrated all of the benefits that laser videodiscs have. However, the I/O Metric system vanished without a trace. I could only find one mention of I/O Metric Corporation on Google. They worked with the US NOAA in 1974 on an atmospheric analysis system. Has anyone heard of I/O Metric before?