UPD device driver, serial drivers

documentation/linux_configuration.tex

@@ -9,14 +9,14 @@
 %  pacman -S hyphen hyphen-de
 %  pacman -S texlive-mathscience
 
-\includeonly{
+%\includeonly{
 	%linux_configuration_13_memory_management_options,
 	%linux_configuration_14_networking_support,
-	linux_configuration_15_device_drivers,
+%	linux_configuration_15_device_drivers,
 	%linux_configuration_16_file_systems,
 	%linux_configuration_17_security_options,
 %	linux_configuration_18_cryptographic_API
-}
+%}
 
 \documentclass[10pt,a4paper]{article}
 %\documentclass[12pt,a4paper]{report}
@@ -149,7 +149,8 @@
 \def\toclevel@subfiveparagraph{9}
 \makeatother
 \setcounter{secnumdepth}{9}% numbering down to paragraphs, subparagraphs
-
+%% use one, two ore more columns 
+\usepackage{multicol}
 %% Line numbers may be useful during collaboration and review, using \linenumbers
 \usepackage[left]{lineno}