diff --git a/README.md b/README.md
index 58b9894..22e5873 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,14 @@ Alcyone is written in a subset of C++11 with selected features from modern stand
 - XDDM: Components related to Display Driver Model
 
 ### SDK Source Directory Structure:
-- CRT: C RunTime
+- INC: Global header files
+- CRT: C RunTime source
+- RTL: Kernel Run-Time Library source
+
+### Boot Source Directory Structure:
+- INC: Boot-specific header files
+- APP/BOOTMGR: Boot Manager source
+- LIB: Boot library routines and firmware abstractions
 
 ### Kernel Source Directory Structure:
 - ALPC: Asynchronous Local Procedure Call