diff --git a/ati-ti/index.php b/ati-ti/index.php
index af94bf0..05e19d0 100644
--- a/ati-ti/index.php
+++ b/ati-ti/index.php
@@ -56,7 +56,7 @@ include "../includes/courses.php";
     <li><a href="cloud_computing.pdf">Cloud Computing</a></li>
     <li><a href="web_architecture.pdf">Web Architecture</a></li>
     <li><a href="service_oriented_architecture.pdf">Service Oriented Architecture</a></li>
-    <li>Web Services Architectures</li>
+    <li><a href="web_service.pdf">Web Services Architectures</a></li>
     <li>Search Engines Architectures</li>
     <li>E-Business &amp; E-Commerce System Architectures</li>
     <li>Web 2.0 &amp; Social Networks Architectures</li>
diff --git a/ati-ti/web_service.pdf b/ati-ti/web_service.pdf
new file mode 100644
index 0000000..c7670f5
Binary files /dev/null and b/ati-ti/web_service.pdf differ