diff --git a/docs/explanation/EPICS-Hosts.md b/docs/explanation/EPICS-Hosts.md
new file mode 100644
index 0000000..bfb659c
--- /dev/null
+++ b/docs/explanation/EPICS-Hosts.md
@@ -0,0 +1,7 @@
+# What is an EPICS IOC Host
+
+
+Some Text
+
+![EPICS IOC host](../images/IOC-Host.png)
+
diff --git a/docs/explanation/EPICS-IOC.md b/docs/explanation/EPICS-IOC.md
new file mode 100644
index 0000000..1750c8d
--- /dev/null
+++ b/docs/explanation/EPICS-IOC.md
@@ -0,0 +1,7 @@
+# What is an EPICS IOC
+
+
+Some Text
+
+![Inside an EPICS IOC](../images/Inside_IOC.png)
+
diff --git a/docs/images/EPICS_new.PNG b/docs/images/EPICS_new.png
old mode 100755
new mode 100644
similarity index 100%
rename from docs/images/EPICS_new.PNG
rename to docs/images/EPICS_new.png
diff --git a/docs/images/IOC-Host.png b/docs/images/IOC-Host.png
new file mode 100644
index 0000000..30c23c0
Binary files /dev/null and b/docs/images/IOC-Host.png differ
diff --git a/docs/images/Inside_IOC.png b/docs/images/Inside_IOC.png
new file mode 100644
index 0000000..6aa9343
Binary files /dev/null and b/docs/images/Inside_IOC.png differ
diff --git a/zensical.toml b/zensical.toml
index 4afcc8e..e564ef2 100644
--- a/zensical.toml
+++ b/zensical.toml
@@ -56,7 +56,9 @@ Copyright © 2026 Paul Scherrer Institute
         { "caQtDM" = "https://caqtdm.github.io/documentation.html"}
    ]},
    { "Explanations" = [
-        "explanation/index.md"
+        "explanation/index.md",
+        { "EPICS IOC" = "explanation/EPICS-IOC.md" },
+        { "EPICS Host" = "explanation/EPICS-Hosts.md" }
    ]},
   ]