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I think high-quality wire recorders were developed in Germany in order to record Hitler's speeches.
Interesting: recording tape, cassette, 8-track, reel-to-reel is just oxides of that same metal of that recording wire, magnetized and read by a head. It's just applied in a thin layer onto a long plastic tape and magnetized and read by a head.
AND videotape is just oxides of that same metal, applied to a thicker plastic tape and magnetized and read by a head.
AND floppy discs are just oxides of that same metal, applied to a plastic disk and magnetized and read by a head.
AND hard drives are just oxides of that same metal, applied to a firm, spinning disk and magnetized and read by a head.
Only when we got to optical disk was it no longer a magnetized surface read by a head. Then, it became pits in metal, read by a laser.
And that's where the story ends, because in the future, everything digital will be kept in solid state memory.
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