"\platform{UNIX}" should really be spelled "\platform{Unix}".
diff --git a/Doc/lib/libresource.tex b/Doc/lib/libresource.tex
index 5e6f109..869bb17 100644
--- a/Doc/lib/libresource.tex
+++ b/Doc/lib/libresource.tex
@@ -2,7 +2,7 @@
          Resource usage information}
 
 \declaremodule{builtin}{resource}
-  \platform{UNIX}
+  \platform{Unix}
 \modulesynopsis{An interface to provide resource usage information on
   the current process.}
 \moduleauthor{Jeremy Hylton}{jhylton@cnri.reston.va.us}