diff --git a/Code/README.md b/Code/README.md
index e3c524f..7a38179 100644
--- a/Code/README.md
+++ b/Code/README.md
@@ -1,16 +1,30 @@
 # Code 
-Here are all the patch codes of PicoCalc's factory program
 
-* PicoCalc_Fuzix_v1.0
-* PicoCalc_MP3Player_v0.5
-* PicoCalc_NES_v1.0
-* PicoCalc_PicoMite_v1.0
-* PicoCalc_uLisp_v1.0
+Here is a collection of firmware source code optimized for PicoCalc. You can download patches based on the original project.
+
+We would like to thank the following open source projects:  
+
+- PicoMite
+[PicoMite](https://geoffg.net/picomite.html) is a [BASIC](https://en.m.wikipedia.org/wiki/BASIC) language interpreter based on the PRI Pico optimized version of MMBasic.
+
+- FUZIX
+[FUXIX](https://www.fuzix.org/)  is a lightweight UNIX-like OS for 8-bit and small systems, designed for minimal resource usage.
+
+- NES emulator
+[shapones](https://github.com/shapoco/shapones) is an NES emulator for programming study on pico.
+
+- uLisp
+[uLisp](www.ulisp.com/) A version of the Lisp programming language for ARM-based boards.
+
+- MP3Player
+A simple MP3 player based on [YAHAL](https://git.fh-aachen.de/Terstegge/YAHAL) which is a Yet Another Hardware Abstraction Library.
 
 
 # Preparation
 
-See how to setup pico sdk development first   
+See how to setup pico sdk development on wiki:
 
 https://github.com/clockworkpi/PicoCalc/wiki/Setting-Up-the-Pico-SDK-on-Linux-for-Pico-Development
 
+RaspberryPI official Address  
+https://www.raspberrypi.com/documentation/pico-sdk/