Yes, a directory is a list of items. Like a telephone directory. A folder is a container of items.
In 2009 I added Folder to the Wikipedia page Directory (computing) Explaining the Folder Metaphor in both English and German (Verzeichnis/Ordner). My clarification has been tweaked and altered slightly to bring it into line with Wikipedia standards, but it has stood the test of time.
I always use the term folder in Linux circles when referring to a container of things. It's useful to stress the importance of the user interface, which is often misunderstood by many there. Be proud!
