Added \label{} for logical addressing.
Logical markup.
diff --git a/Doc/lib/libsomeos.tex b/Doc/lib/libsomeos.tex
index 3a502a7..1e282f5 100644
--- a/Doc/lib/libsomeos.tex
+++ b/Doc/lib/libsomeos.tex
@@ -1,8 +1,9 @@
\chapter{Optional Operating System Services}
+\label{someos}
The modules described in this chapter provide interfaces to operating
system features that are available on selected operating systems only.
-The interfaces are generally modelled after the \UNIX{} or C
+The interfaces are generally modelled after the \UNIX{} or \C{}
interfaces but they are available on some other systems as well
(e.g. Windows or NT). Here's an overview:
@@ -32,7 +33,7 @@
\item[zlib]
\item[gzip]
--- Compression and decompression compatible with the
-\code{gzip} program (zlib is the low-level interface, gzip the
-high-level one).
+\program{gzip} program (\module{zlib} is the low-level interface,
+\module{gzip} the high-level one).
\end{description}