Taxonomy
TopicTaxonomy in Drupal provides a way to classify your site’s content. Taxonomy vocabularies are created with terms within those vocabularies.
Build Drupal Sites
GuidePatches are used to describe modifications made to one or more code files, and can be used to share those changes.
Entities are the fundamental building blocks that make up any Drupal site. Having a good understanding of the Entity system is an important part of ensuring the data model of your Drupal site is set up properly.
Modules are bundles of primarily PHP code that extend Drupal in order to add new features or alter existing functionality.