diff --git a/html/index.html b/html/index.html
index 7f94194e..57869fab 100644
--- a/html/index.html
+++ b/html/index.html
@@ -11,9 +11,9 @@
     </div><p>All articles are written in Markdown format, you can download them for offline reading, contribute new articles or update existing ones in <a href="https://bitbucket.org/zhb/docs.iredmail.org/">BitBucket repository</a>.</p>
 <h3 id="overview">Overview</h3>
 <ul>
-<li><a href="used.components.html">Major components used in iRedMail</a></li>
-<li><a href="file.locations.html">Locations of configuration and log files of mojor components</a></li>
+<li><a href="used.components.html">Major open source softwares used in iRedMail</a></li>
 <li><a href="network.ports.html">Which network ports are open by iRedMail</a></li>
+<li><a href="file.locations.html">Locations of configuration and log files of mojor components</a></li>
 </ul>
 <h3 id="install-iredmail">Install iRedMail</h3>
 <ul>
diff --git a/html/used.components.html b/html/used.components.html
index 94b58a57..48abcbb9 100644
--- a/html/used.components.html
+++ b/html/used.components.html
@@ -1,7 +1,7 @@
 <html>
     <head>
         <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
-        <title>Major components used in iRedMail</title>
+        <title>Major open source softwares used in iRedMail</title>
         <link href="./css/markdown.css" rel="stylesheet"></head>
     </head>
     <body>
@@ -10,7 +10,7 @@
         <a href="http://www.iredmail.org" target="_blank">iRedMail web site</a>
     
         // <a href="./index.html">Document Index</a>
-    </div><h1 id="major-components-used-in-iredmail">Major components used in iRedMail</h1>
+    </div><h1 id="major-open-source-softwares-used-in-iredmail">Major open source softwares used in iRedMail</h1>
 <table cellpadding="4px;">
 <thead>
 <tr>
diff --git a/overview/1-used.components.md b/overview/1-used.components.md
index 2bc3e536..45fa22a1 100644
--- a/overview/1-used.components.md
+++ b/overview/1-used.components.md
@@ -1,4 +1,4 @@
-# Major components used in iRedMail
+# Major open source softwares used in iRedMail
 
 <table cellpadding="4px;">
 <thead>
diff --git a/overview/network.ports.md b/overview/2-network.ports.md
similarity index 100%
rename from overview/network.ports.md
rename to overview/2-network.ports.md
diff --git a/overview/file.locations.md b/overview/3-file.locations.md
similarity index 100%
rename from overview/file.locations.md
rename to overview/3-file.locations.md
