#MOC # Personal Knowledge Management Personal knowledge management (PKM) is a **process of creating a repository of personal knowledge** one finds useful. That repository is often referred to as a 'second brain'. This repository is then used to link diverse topics together. ![[Building a Second Brain (Tiago Forte)#^x7mnyf]] This is achieved by using a structured system of storing notes (see [[The PARA Method]]), and by using techniques such as [[Progressive Summarization]] to simplify retrieval. Although PKM as a **term is relatively new** (it was probably coined in 1999[^1]), **the idea of maintaining a second brain is not**. Before the advent of modern technology we kept [Commonplace books](https://en.wikipedia.org/wiki/Commonplace_book), which were especially popular during the Renaissance, and Niklas Luhmann is famous for his [[Zettelkasten]]. A digitized version of Isaac Newton's commonplace book, which he called his [waste book](http://cudl.lib.cam.ac.uk/view/MS-ADD-04004/127) is available online. It contains his notes on calculus. [^1]: [[Personal Knowledge Management - Wikipedia#^nxy6bo]] See [[Advice on Creating a Second Brain]] which covers some general principles you should follow. ## Digital Tools for PKM - [[Obsidian]] - [[Notion]] - See also: [[Obsidian vs Notion for PKM]] - [Logseq](https://logseq.com/) Be careful when using deep organizational structures with digital tools. See [[Benefits of Using Flat Organizational System for PKM]]. ## People - [[Nick Milo]] - [[Tiago Forte]]