diff --git a/CloudComputing_Lab/modules/ROOT/pages/tech-list.adoc b/CloudComputing_Lab/modules/ROOT/pages/tech-list.adoc
index 863551f..4916513 100644
--- a/CloudComputing_Lab/modules/ROOT/pages/tech-list.adoc
+++ b/CloudComputing_Lab/modules/ROOT/pages/tech-list.adoc
@@ -18,6 +18,7 @@ TIP: Why Open Source!
 
 video::a8fHgx9mE5U[youtube, start=0]
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+Open source refers to an openly distributed program code (including codes that are *free of charge*) that can be *utilized* and *modified* by the end user *without restriction.*
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