PKM

PKM (Personal Knowledge Management) is the umbrella term for the practices, tools, and methodologies of collecting, organizing, and retrieving information you encounter — notes, highlights, references, ideas. The discipline predates modern software, but re-emerged in the 2010s–2020s around tools like Obsidian, Roam Research, Logseq, and Notion.

Core methodologies you'll see recur: Zettelkasten, evergreen notes, digital gardens, MOC-based navigation. Tiago Forte's "Building a Second Brain" framework sits in the same space.

The word "personal" is load-bearing: a PKM system reflects how you think, not an objective ontology. Two people with the same notes will organize them differently, and that's fine — the system is a thinking partner, not a library catalog.