diff --git a/README.md b/README.md
index 0c54a83..27c9a3d 100644
--- a/README.md
+++ b/README.md
@@ -112,6 +112,8 @@ Title | Description | Focus
 * [A lesson in shortcuts](https://plus.google.com/+RobPikeTheHuman/posts/R58WgWwN9jp) - How the idea of "hidden" or "dot" files was born, by Rob Pike.
 * [dotfiles.github.io](http://dotfiles.github.io) - Your unofficial guide to dotfiles on GitHub.
 * [OS X Defaults](https://github.com/kevinSuttle/macOS-Defaults) - Centralized place for the awesome work started by [@mathiasbynens on .macos](https://github.com/mathiasbynens/dotfiles#sensible-macos-defaults).
+* [Filesystem Hierarchy Standard](https://en.wikipedia.org/wiki/Filesystem_Hierarchy_Standard) - Directory structure and directory contents in Linux distributions.
+* [XDG Base Directory Specification](https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html) - [Summary](https://wiki.archlinux.org/index.php/XDG_Base_Directory)
 
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