diff --git a/Rules-for-adding-new-device-types.md b/Rules-for-adding-new-device-types.md
index b8893d1..8f92f9b 100644
--- a/Rules-for-adding-new-device-types.md
+++ b/Rules-for-adding-new-device-types.md
@@ -9,4 +9,4 @@ Steps for adding a new device type:
 5. Verify that _rasctl -s_ reports the correct device type properties.
 6. Update the manpages.
 
-Devices should inherit from the PrimaryDevice or ModeSenseDevice classes. Only devices backed by image files should inherit from the Disk class. See the implementation of the Host Services for a device implementation with low complexity.
\ No newline at end of file
+Devices should inherit from the PrimaryDevice or ModeSenseDevice classes. Only devices backed by image files should inherit from the Disk class. See the implementation of the Host Services (SCHS) for a device implementation with low complexity.
\ No newline at end of file