1 files changed, 7 insertions, 2 deletions
diff --git a/src/README b/src/README
index 4b120dc..620fab3 100644
--- a/src/README
+++ b/src/README
@@ -16,6 +16,11 @@ kernel utility routines
 * port.c, port.asm - I/O ports
 * interrupts.c, interrups.asm - interrupt handlers
 
+C library definitions
+* stddef.h - definition of NULL, size_t
+* limits.h - domain range constants like INT_MAX
+
 C library routines
-* string.c
-* stdlib.c
+* string.c - string, memory functions
+* stdlib.c - UNIX standard library functions
+* stdio.c - I/O functions, printing