diff --git a/INTERNALS.md b/INTERNALS.md
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--- a/INTERNALS.md
+++ b/INTERNALS.md
@@ -1,6 +1,26 @@
 ## MySQLTuner Internals
 
-
+## Table of contents
+    * [MySQLTuner Internals](#mysqltuner-internals)
+    * [MySQLTuner steps](#mysqltuner-steps)
+    * [MySQLTuner get login information steps](#mysqltuner-get-login-information-steps)
+    * [MySQLTuner system checks](#mysqltuner-system-checks)
+    * [MySQLTuner Server version checks](#mysqltuner-server-version-checks)
+    * [MySQL Storage engine general information](#mysql-storage-engine-general-information)
+    * [MySQLTuner security checks](#mysqltuner-security-checks)
+    * [MySQLTuner database information](#mysqltuner-database-information)
+    * [MySQLTuner index information](#mysqltuner-index-information)
+    * [MySQLTuner Connections information](#mysqltuner-connections-information)
+    * [MySQLTuner server information](#mysqltuner-server-information)
+    * [MySQLTuner sort, join and temp table information](#mysqltuner-sort-join-and-temp-table-information)
+    * [MySQLTuner global buffer information](#mysqltuner-global-buffer-information)
+    * [MySQLTuner query cache checks](#mysqltuner-query-cache-checks)
+    * [MySQLTuner slow queries checks](#mysqltuner-slow-queries-checks)
+    * [MySQLTuner replication checks](#mysqltuner-replication-checks)
+    * [MySQLTuner InnoDB information](#mysqltuner-innodb-information)
+    * [MySQLTuner ARIADB information](#mysqltuner-ariadb-information)
+    * [MySQLTuner MYISAM information](#mysqltuner-myisam-information)
+    
 ## MySQLTuner steps
 
 * Header Print