diff --git a/COMMAND-System.md b/COMMAND-System.md
new file mode 100644
index 0000000..a7cd111
--- /dev/null
+++ b/COMMAND-System.md
@@ -0,0 +1,10 @@
+# The `system.*` Command Group
+
+
+## system.env=NAME (since 0.9.7)
+
+Query the value of an environment variable, returns an empty string if `NAME` is not defined. Example:
+
+```ini
+session.path.set=(cat,(system.env,RTORRENT_HOME),"/.session")
+```
\ No newline at end of file