diff --git a/doc/architecture.txt b/doc/architecture.txt
--- a/doc/architecture.txt
+++ b/doc/architecture.txt
@@ -57,6 +57,8 @@ Concepts:
   - servers: A server, though having many more functions, shall be able to also perform the list
       of actions a client may perform.
 
+- user: A user is an entity which is given access to a distren server.
+
 - file: There are different uses of files above and distributed rendering requires file distribution.
   - file identification: Every file mentioned above was at least in the context of a job. Thus,
       file identification numbers shall be assigned in the context of a job identification number.