diff --git a/runoff.list b/runoff.list
index 26fc480..37bfe2c 100644
--- a/runoff.list
+++ b/runoff.list
@@ -46,8 +46,10 @@ fs.c
 bio.c
 ide.c
 
-# pipe and string library
+# pipes
 pipe.c
+
+# string operations
 string.c
 
 # low-level PC