unity3d in special-purpose directory what? What is the use?

unity3d in special-purpose directory what? What is the use?

There are some in unity3d directory name is a special purpose, if the Editor directory, can be made ​​into the IDE tool code, unity3d IDE will automatically recognize. There Resources directory, you can use this Resources.Load () method to achieve real-time resources to run the scene to load, without the need for resources in advance by way of attachment other game objects loaded into the scene.

I also found the following catalog, Assets Plugins Textures Materials Models Prefab Shaders Scripts

Does the above in several directories, which is also a directory with special features, and how it has special functions?
Thank you for your reply oh

I think you’re looking for something like this: