diff --git a/2d barcodes.md b/2d barcodes.md
index 41fc7e9ca..105545586 100644
--- a/2d barcodes.md	
+++ b/2d barcodes.md	
@@ -1,6 +1,11 @@
 - a [[list]].
-  - [[qr code]]
-  - [[aztec code]]
-  - [[maxicode]]
-  - [[data matrix]] up to 2.3k chars
-  - [[SPARQCode]]
+  - [[monochrome]]
+    - [[qr code]]
+    - [[aztec code]]
+    - [[maxicode]]
+    - [[data matrix]] up to 2.3k chars
+    - [[SPARQCode]]
+    - [[PDF417]]
+  - [[color]]
+    - [[jab]]
+    - [[hccb]]