• PM_Your_Nudes_Please@lemmy.world
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      11 hours ago

      More like microscopic fidget bubble poppers.

      When the computer wants a bit to be a 1, it pops it down. When it wants it to be a 0, it pops it up.

      If it were like a punch card, it couldn’t be rewritten as writing to it would permanently damage the disc. A CD-RW is basically a microscopic punch card though, because the laser actually burns away material to write the data to the CD.