diff --git a/lectures/revealjs/02-software-development.adoc b/lectures/revealjs/02-software-development.adoc
index f8dd6c14d260de904bc709f30bddb3aca6741448..7492a7d10906e8894fa11eaa14e3b0410841c410 100644
--- a/lectures/revealjs/02-software-development.adoc
+++ b/lectures/revealjs/02-software-development.adoc
@@ -226,9 +226,9 @@ image::../images/lecture02/qr-app-one2act-no.svg[width=400]
 
 == SCM Tools
 
-- CVS
-- SVN
-- Git
+- CVS (Concurrent Versioning System, released 1990)
+- SVN (Apache Subversion, released 2000)
+- Git (created by Linus Torvalds , released 2005)
 - Mercurial