Second Brain / Industry term
Personal knowledge management (PKM)
Personal knowledge management (PKM) is the practice of capturing, organizing, and reusing the information you encounter so it stays findable and useful over time instead of scattering across apps.
Personal knowledge management (PKM) is the practice of capturing, organizing, and reusing the information you encounter so it stays findable and useful over time instead of scattering across apps. The loop is simple: you save something the moment you notice it, you give it enough structure to find later, and you pull it back when a task needs it. Say a useful fix for a password reset bug comes up in a chat. With PKM you drop it into one capture spot, tag it so a later search for "login" surfaces it, and three months on you ask your assistant for it by topic instead of scrolling a year of messages. Without that loop, the same lesson gets relearned every time.
Builder example
AI can lower the cost of classification, linking, summarization, and retrieval, while also creating duplicates and unsupported summaries at scale. A useful system preserves sources, ownership, dates, and deletion paths, and measures whether people can retrieve and apply the needed record.
Common confusion: PKM is the practice of capturing and reusing information; a note-taking app is one tool you might use for it. You can run a PKM loop with plain files and a search box, and you can own three feature-rich apps and still have no working loop because nothing gets reviewed or reused.