Documented new contents of lib5.tex
diff --git a/Doc/lib.tex b/Doc/lib.tex
index e546132..1bad16b 100644
--- a/Doc/lib.tex
+++ b/Doc/lib.tex
@@ -47,7 +47,7 @@
 \include{lib2}	% built-in modules
 \include{lib3}	% standard modules
 \include{lib4}	% Most OS'es; UNIX only; Amoeba only
-\include{lib5}	% STDWIN only; SGI machines only
+\include{lib5}	% STDWIN only; SGI machines only; SUNs only; AUDIO TOOLS
 
 \input{lib.ind}	% The index