= Second brain
In the 2020's, this refers to writing down everything you know, usually in some graph structured way.
This is somewhat the centerpiece of <Ciro Santilli's documentation superpowers>: dumping your brain into text form, which he has been doing through <Ciro Santilli's website>.
This is also the closest one can get to immortality pre full blown <transhumanism>.
Ciro's still looking for the restore this plaintext backup on a new body though.
It is a good question, how much of your knowledge you would be able to give to others with text and images. It is likely almost all of it, except for coordination/signal processing tasks.
His passion for <braindumping> like this is a big motivation behind <Ciro Santilli>'s <OurBigBook.com> work.
Bibliography:
* https://www.buildingasecondbrain.com/