RWTH-Publications-(english)/3.-Application-and-usage.md

@@ -1023,7 +1023,7 @@ Entries to RWTH Publications may only be made using your own login. The passing
 						<li>Guest commentary = guest comment</li>
 						<li>Interview = interview</li>
 						<li>Invited = invitation to give a presentation at the conference</li>
-						<li>Letter = letter</li>
+						<li>Letter = letter, communication with editors and/or other scientists</li>
 						<li>Mass media = articles from newspapers, newsletters or Internet services</li>
 						<li>Other = other kinds of presentation</li>
 						<li>Outreach = article which is mainly addressed to a non-scientific community (e.g. adult education centres or training centres) </li>