https://en.wikipedia.org/wiki/Niklas_Luhmann
Note-taking system (Zettelkasten)
Luhmann was famous for his extensive use of the "slip box" or Zettelkasten note-taking method. He built up a zettelkasten of some 90,000 index cards for his research, and credited it with making his extraordinarily prolific writing possible. It was digitized and made available online in 2019.[27] Luhmann described the zettelkasten as part of his research into systems theory in the essay Kommunikation mit Zettelkästen.[28]
Missing Link: Luhmanns Denkmaschine endlich im Netz
Communicating with Slip Boxes
Learning How to Read
意思是說，系統之前，只是碎片，系統之後，還是碎片，
意思是說，碎片是一切的開始，也是一切的歸宿，
