diff --git a/slides/github_gitlab.md b/slides/github_gitlab.md
index a2789c90d65c8a6c9510f874406a51a6b4a87754..683c6757aefefc43902c85beb00301a3ce44c89b 100644
--- a/slides/github_gitlab.md
+++ b/slides/github_gitlab.md
@@ -1 +1,13 @@
 ## GitHub and GitLab
+
+GitHub and GitLab are VCS systems.
+
+GitHub is **public**, whereas GitLab is **restricted/private**.
+
+Positive point: GitHub and GitLab are (almost) the same.
+
+
+## GitHub
+
+
+## GitLab