Added knowledge management description

README.md

@@ -1145,6 +1145,8 @@ A [human resources management system](https://en.wikipedia.org/wiki/Human_resour
 
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+[Knowledge management](https://en.wikipedia.org/wiki/Knowledge_management) is the collection of methods relating to creating, sharing, using and managing the knowledge and information.
+
 _Related: [Note-taking & Editors](#note-taking--editors), [Wikis](#wikis)_
 
 - [Mindmaps](https://github.com/drichard/mindmaps) - Open source, offline capable, mind mapping application. ([Demo](https://www.mindmaps.app)) `AGPL-3.0` `HTML5`