diff --git a/camera/README.md b/camera/README.md
index 8ce3352..25badfd 100644
--- a/camera/README.md
+++ b/camera/README.md
@@ -10,3 +10,8 @@
 
 More complete information about the Android camera HAL and subsystem can be found at
 [source.android.com](http://source.android.com/devices/camera/index.html).
+
+### AIDL Camera HAL Interfaces
+
+The AIDL Camera HAL interfaces can be found in the respective <interface>/aidl
+directories.
diff --git a/camera/provider/README.md b/camera/provider/README.md
index 0718fb1..7666a58 100644
--- a/camera/provider/README.md
+++ b/camera/provider/README.md
@@ -35,3 +35,9 @@
 First HIDL version of the camara provider HAL callback interface, closely
 matching the feature set and operation of the pre-HIDL camera HAL module
 callbacks v2.4.
+
+### AIDL Camera HAL Default Implementation ###
+
+The default implementation can be found at
+$ANDROID_BUILD_TOP/hardware/google/camera/common/hal/aidl_service and
+$ANDROID_BUILD_TOP/hardware/google/camera/devices/EmulatedCamera