The “Library of Babel" is a collection of code blocks. Like a function library, these code blocks can be called from other Org files. A collection of useful code blocks is available on Worg. For remote code block evaluation syntax, see Evaluating Code Blocks.
For any user to add code to the library, first save the code in regular code blocks of an Org file, and then load the Org file with
org-babel-lob-ingest, which is bound to
C-c C-v i.