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Wikipedia says it was Conrad Gessner in the 16th century: https://en.wikipedia.org/wiki/Zettelkasten https://en.wikipedia.org/wiki/Zettelkasten
by qznc 6y ago
Wikipedia says it was Conrad Gessner in the 16th century: https://en.wikipedia.org/wiki/Zettelkasten https://en.wikipedia.org/wiki/Zettelkasten