diff --git a/README.md b/README.md
index 1d08838..7548847 100644
--- a/README.md
+++ b/README.md
@@ -3,3 +3,9 @@
 ```
 $ make
 ```
+
+# Builtin Words
+
+| char | semantics          |
+|:----:|:------------------:|
+| Q    | Exit the process   |