Interesting find by @chrisaldrich:

"It was fascinating to run across the memindex a productivity tool from the Wilson Memindex Co., advertised in a December 1906 issue of System: The Magazine of Business."

#MemIndex #43Folders #BulletJournal #HipsterPDA

https://boffosocko.com/2023/03/09/the-memindex-method-an-early-precursor-of-the-memex-hipster-pda-43-folders-gtd-basb-and-bullet-journal-systems/