diff --git a/index.html b/index.html
index d89cbf6..b0d230c 100644
--- a/index.html
+++ b/index.html
@@ -75,6 +75,7 @@
 			<h2>G</h2>
 			<ul>
 				<li><ziba-link>gaussian distribution</ziba-link></li>
+				<li><ziba-link>gaussian process</ziba-link></li>
 				<li><ziba-link>gradient descent</ziba-link></li>
 				<li><ziba-link>ground truth</ziba-link></li>
 			</ul>
@@ -135,6 +136,7 @@
 				<li><ziba-link>pareto distribution</ziba-link></li>
 				<li><ziba-link>porter stemmer</ziba-link></li>
 				<li><ziba-link>principal component analysis</ziba-link></li>
+				<li><ziba-link>python programming language</ziba-link></li>
 			</ul>
 		</section>
 		<section id="Q">
@@ -143,6 +145,7 @@
 		<section id="R">
 			<h2>R</h2>
 			<ul>
+				<li><ziba-link>r programming language</ziba-link></li>
 				<li><ziba-link>random forest</ziba-link></li>
 				<li><ziba-link>recurrent neural network</ziba-link></li>
 				<li><ziba-link>regression</ziba-link></li>