diff --git a/code/C/Makefile b/code/C/Makefile
index 9892cdf..cf62c8d 100644
--- a/code/C/Makefile
+++ b/code/C/Makefile
@@ -2,8 +2,17 @@
 # exemples pour le chapitre sur le C
 # new Sat Feb 11 12:06:34 CET 2023
 
+
 all:	no-op slowprint fgets-simple packtest use_envp
 
+# simplified version of the canonical first C program
+hello:	hello.c Makefile
+	gcc -Wall  $< -o $@
+
+# please show me the command line
+arguments: arguments.c Makefile
+	gcc -Wall  $< -o $@
+
 no-op:			no-op.c Makefile
 	gcc -Wall $< -o $@
 
diff --git a/code/Makefile b/code/Makefile
index 8cdcca1..4ead727 100644
--- a/code/Makefile
+++ b/code/Makefile
@@ -10,23 +10,9 @@ ex_curses:	ex_curses.c Makefile
 thread-demo:	thread-demo.c Makefile
 	gcc -Wall -pthread $< -o $@ 
 
-hello:		hello.c Makefile
-	gcc -Wall $< -o $@
-
-arguments:	arguments.c Makefile
-	gcc -Wall $< -o $@
-
 voirenv:	voirenv.c Makefile
 	gcc -Wall $< -o $@
 
-#------------- OSC -----------------------
-
-osc:	send-osc listen-osc
-
-send-osc:	send-osc.c Makefile
-	gcc -Wall $< -llo -o $@
-listen-osc:	listen-osc.c Makefile
-	gcc -Wall $< -llo -o $@
 
 #------------- IPC -----------------------
 
diff --git a/code/OSC/Makefile b/code/OSC/Makefile
new file mode 100644
index 0000000..b87c8a3
--- /dev/null
+++ b/code/OSC/Makefile
@@ -0,0 +1,9 @@
+#------------- OSC -----------------------
+
+osc:	send-osc listen-osc
+
+send-osc:	send-osc.c Makefile
+	gcc -Wall $< -llo -o $@
+
+listen-osc:	listen-osc.c Makefile
+	gcc -Wall $< -llo -o $@