diff --git a/TODO b/TODO
index 969a09c..f790268 100644
--- a/TODO
+++ b/TODO
@@ -27,3 +27,6 @@ install
 find (bare minimum)
 
 at
+
+For more commands that might need to be implemented
+refer to: http://pubs.opengroup.org/onlinepubs/9699919799/idx/utilities.html