this reference is to Solaris' cat

Author: Vladimir Kotal

proc.tex

@@ -1159,9 +1159,10 @@
     \item in IRIX it is possible to use \texttt{MAP\_AUTOGROW} that will
     automatically grow mapped object when accessing beyond its current end.
     \end{itemize}
-\item Example of a system command using file mapping is \texttt{cat(1)}.  Using
-mapped memory is more efficient than calling \texttt{read} repeatedly, saving
-the overhead necessary for switching to kernel and back to userspace.
+\item Example of a system command using memory mapped files is \texttt{cat(1)}
+on Solaris (for regular files). Using mapped memory is more efficient than
+calling \texttt{read} repeatedly, saving the overhead necessary for switching to
+kernel and back to userspace.
 \end{itemize}
 
 %%%%%