--- a/unix-phil.ms	Sun Feb 21 14:52:53 2010 +0100
+++ b/unix-phil.ms	Sun Feb 21 17:23:19 2010 +0100
@@ -220,7 +220,7 @@
 and shows concrete examples of its application.
 
 .SH
-Examples
+Pipes
 .LP
 Following are some examples to demonstrate how applied Unix Philosophy feels like.
 Knowledge of using the Unix shell is assumed.
@@ -268,10 +268,7 @@
 to get the desired output.
 There are also other ways to get the same output.
 It's a user's decision which way to go.
-
-.SH
-Pipes
-.LP
+.PP
 The examples show that many tasks on a Unix system
 are accomplished by combining several small programs.
 The connection between the single programs is denoted by the pipe operator `|'.
@@ -296,7 +293,7 @@
 They have to interfaces that allows them to be used in such a way.
 
 .SH
-Interface architecture
+Interface design
 .LP
 Unix is, first of all, simple \(en Everything is a file.
 Files are sequences of bytes, without any special structure.
@@ -628,11 +625,21 @@
 but parts of it become successful instead?
 
 .SH
-Results
+Summary
 .LP
-The unix phil is an answer to the sw design question
-.LP
-tool chains empower the uses of sw
+This chapter explained the central ideas of the Unix Philosophy.
+For each of the ideas, it was exposed what advantages they introduce.
+The Unix Philosophy are guidelines that help to write valuable software.
+From the view point of a software developer or software designer,
+the Unix Philosophy provides answers to many software design problem.
+.PP
+The various ideas of the Unix Philosophy are very interweaved
+and can hardly be applied independently.
+However, the probably most important messages are:
+.I "``Do one thing well!''" ,
+.I "``Keep it simple!''" ,
+and
+.I "``Use software leverage!''