The Art and Science of Mess Management (1981) [pdf]
systemswisdom.com
systemswisdom.com
I seem to remember he said he could save tens of minutes of the user everyday by seeing how someone uses the computer. It was not the Zettelkasten or the Dewey Decimal System but those topics were also possibly discussed in that hackernews thread.
I believe this is (one of) the relevant thread(s): https://news.ycombinator.com/item?id=36544879
> I hereby claim that I am able to save you at least twenty minutes of your computer time a day just by looking over your shoulder and suggesting more advanced tools, better methods, and efficient workflows.
A starting point: https://youtu.be/yGN5DBpW93g
And, > "Such discussions are more likely to suppress symptoms than relieve ailments."