I always forget about these until I stumble upon the one I have:
Capacitance Electronic Discs. Like phonographs for TV. The technology was very neat and very doomed.
@readsteven This statement has me puzzled: "To avoid metric names they are usually called "12 inch discs"."
Why an aversion to metric names?
@sohkamyung That Wikipedia article has a lot of problems.
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