diff --git a/MelangeURLs.wiki b/MelangeURLs.wiki
index 03c2ca7..bcab9e7 100644
--- a/MelangeURLs.wiki
+++ b/MelangeURLs.wiki
@@ -26,6 +26,11 @@
     * */google/gsoc2013/melange*
 
 == Module Component ==
+Melange knows three module components:
+  # gsoc, Google Summer of Code programs
+  # gci, Google Code-In programs
+  # core, general site-wide configuration and pages are handled here. Core pages do not have a module component in the url.
+
 
 == Components component ==
 
@@ -42,5 +47,3 @@
 = Conventions around GET parameters =
   * Get parameters are used for things like telling the user that their form was saved correctly
   * GCI uses Get parameters to determine action in task view.
-
-