diff --git a/slides/k8s/concepts-k8s.md b/slides/k8s/concepts-k8s.md
index 5dfc596b..b4d51f60 100644
--- a/slides/k8s/concepts-k8s.md
+++ b/slides/k8s/concepts-k8s.md
@@ -193,9 +193,19 @@ No!
 
 - Or leverage other pluggable runtimes through the *Container Runtime Interface*
 
-  (like CRI-O, or containerd)
+- <del>We could also use `rkt` ("Rocket") from CoreOS</del> (deprecated)
 
-- Different install methods and distributions use different runtimes
+- [containerd](https://github.com/containerd/containerd/blob/master/README.md):
+maintained by Docker, IBM, and community
+
+- Used by Docker Engine, microK8s, k3s, GKE, and standalone. Has `ctr` CLI
+
+- [CRI-O](https://github.com/cri-o/cri-o/blob/master/README.md):
+maintained by Red Hat, SUSE, and community. Based on containerd
+
+- Used by OpenShift and Kubic, version matched to Kubernetes
+
+- [And more](https://kubernetes.io/docs/setup/production-environment/container-runtimes/)
 
 ---