173 - Knowledge Management - is the second layer of abstraction in note taking, with the first being information storage as a solution to a limited memory. Once the information has been stored, then you add layers of structure to facilitate information retrieval. This means being able to find the right set of information once you are presented with a retrieval cue.
In the case of this note, perhaps you see the word retrieval cue and don’t know what the term means. So you either search for a note on it or type it into google. It is a stimulus (e.g. seeing the word on the screen) that prompts you to search for more information on it (e.g. google the phrase retrieval cue).
Traditionally, before the computer, people relied on custom search tools to find the information. These would take the form of an index, table of contents, reference book, or word of mouth.
The third layer of abstraction is the introduction of tools that promote not just management, but development.