diff --git a/threads-intro/README.md b/threads-intro/README.md
new file mode 100644
index 0000000..4d01b35
--- /dev/null
+++ b/threads-intro/README.md
@@ -0,0 +1,10 @@
+
+A simple set of programs that use threads:
+- `t0.c`
+- `t1.c`
+
+Each one depends on header files found in `../include`
+
+The Makefile is simplistic but will do.
+
+
diff --git a/threads-intro/t0.c b/threads-intro/t0.c
index 1d238a8..61c18ce 100644
--- a/threads-intro/t0.c
+++ b/threads-intro/t0.c
@@ -1,8 +1,9 @@
-#include "common.h"
-#include "common_threads.h"
-#include <pthread.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <pthread.h>
+
+#include "common.h"
+#include "common_threads.h"
 
 void *mythread(void *arg) {
     printf("%s\n", (char *) arg);
diff --git a/threads-intro/t1.c b/threads-intro/t1.c
index 7dc2571..a334dfe 100644
--- a/threads-intro/t1.c
+++ b/threads-intro/t1.c
@@ -1,8 +1,9 @@
-#include "common.h"
-#include "common_threads.h"
-#include <pthread.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <pthread.h>
+
+#include "common.h"
+#include "common_threads.h"
 
 int max;
 volatile int counter = 0; // shared global variable