In addition mercury delay lines lost their data when unpowered.
My money would be on https://en.wikipedia.org/wiki/Disk_pack. Those are objects that people carried around to move data (http://www.catb.org/esr/writings/taoup/html/ch02s01.html: Ken Thompson quietly began answering requests by shipping out tapes and disk packs — each, according to legend, with a note signed “love, ken”)
Call it the floppy disk of the 1970s
Because that's the data bucket. At least that's what I learned at university. Seriously.
In addition mercury delay lines lost their data when unpowered.
My money would be on https://en.wikipedia.org/wiki/Disk_pack. Those are objects that people carried around to move data (http://www.catb.org/esr/writings/taoup/html/ch02s01.html: Ken Thompson quietly began answering requests by shipping out tapes and disk packs — each, according to legend, with a note signed “love, ken”)
Call it the floppy disk of the 1970s