Is there a resource for understanding each of the items in the Node Library?

Packages
1

Sorry if this is a noob question, just trying to get a handle on each of the tools I have at my disposal…

2

I should have poked around more, it appears that what I’m looking for is in the PDF tutorial

http://dynamobim.org/wp-content/uploads/forum-assets/colin-mccroneautodesk-com/07/10/Dynamo_language_guide_version_1.pdf