diff --git a/Manuals/Tcpi-ug/Commons.ent b/Manuals/Tcpi-ug/Commons.ent
index b2cdd5a..21b4a47 100755
--- a/Manuals/Tcpi-ug/Commons.ent
+++ b/Manuals/Tcpi-ug/Commons.ent
@@ -14,3 +14,9 @@
 <!ENTITY TCC        "&TC; Community">
 <!ENTITY TCD        "&TC; Distribution">
 <!ENTITY TCMIRRORS  "<ulink url='http://mirrors.centos.org/'>&TC; Mirrors</ulink>">
+<!ENTITY TCWIKI     "<ulink type='http' url='http://wiki.centos.org/'>&TC; Wiki</ulink>">
+
+<!-- About The CentOS Project Infrastructure -->
+
+<!ENTITY TCPI       "The CentOS Project Infrastructure">
+<!ENTITY TCPIUG     "<citetitle>&TCPI; User's Guide</citetitle>">