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+What is open source? How does it work? 
+Who writes code for nothing and why?
+
+- traditional software model
+	- product-oriented
+	- company finances development of software
+	- same copy of software object code is sold under a very restrictive
+	  license
+	- license fees refinance cost of development
+	- enforcement of restrictive license guarantees revenue
+	- advantages
+		- proven business model
+	- disadvantage
+		- have to develop everything on your own or buy licenses of 3rd
+		  party software
+		- less flexibility for the customer
+		- does the customer trust the 'black box' you are selling?
+		- if vendor goes out of business, no bugfixes/updates
+
+- open source model
+	- service based
+	- individual parties contribute code parts
+	- software is distributed for free 
+	- software is distributed under very permissive license
+	- service / support / customization refinance development
+	- advantages
+		- vast amount of available FOSS can be used as foundation for
+		  own products
+		- source code is available for peer review
+		- bug fixes for free, people just send you patches
+		- new features impelemented by your users!
+	- disadvantage
+		- business model has yet to be proven to work
+	
+- important open source license
+	- BSD style license
+		- permits any use of the sourcecode as long as copyright notice
+		  remains
+	- GPL (GNU General Public License)
+		- source for resulting binary has to be provided
+		- ensures that derivates of free software are still free
+	- LGPL (GNU Lesser General Public License)
+		- permits linking with non-gpl code (mainly used for libraries)
+
+- difference free software / open source 
+	- term 'free software' (free as in freedom, not beer) introduced by
+	  Stallman / FSF 1984.
+	  	- focus on political/ethical/philosophical freedom
+	- open source software (OSS) introduced by OSI in 1997
+		- focus on technological advantage by means of source review
+	- most FOSS licenses match both definitions, OSS less restrictive
+
+- history of FOSS
+	- initially software always for free in source (e.g. IBM S/360)
+	- as hardware gets less expensive, companies start to license
+	  software for money
+	- some people (Stallman, et. al.) didn't want to give up the freedom
+	  they're used to.
+	- 1983: GNU project is founded, goal: Implementation of a free UNIX-like
+	  operating system
+	- 1984: Free Software Foundation is established as non-for-profit legal
+	  entity behind the GNU project
+	- 1991: Linus Torvalds releases the first version of the Linux Kernel
+	  under the GNU GPL license.  Together with the other parts from the
+	  GNU project and others, a 100% free operating system is available
+	- 1994-2000: Free Software is increasingly recognized as reliable,
+	  stable alternative to proprietary software
+
+- Who is behind FOSS?
+	- in the beginning mostly computer enthusiasts with academic background
+		- motivation through
+			- fight: david <-> goliath
+			- to show how bad most proprietary software is
+			- to make the internet a better place
+			- to work together with _very_ good programmers
+			- to gain more experience / better reputation
+	- more and more commercial entities recognize the value of FOSS
+		- contributions to existing projects
+		- start of new projects
+		- contracting consultants and FOSS companies for implementation
+		  of missing features
+	- experienced end-users
+	- independent consultants
+	- academic institutions (e.g. exim, cyrus)
+	- mixed FOSS / proprietary companies (like Astaro)
+		- use FOSS as foundation for their proprietary solutions
+		- have a vital need for a reliable and up-to-date foundation,
+		  thus contribute back to and/or fund FOSS
+
+- development process, communication
+	- everybody who agrees to the license can contribute code
+	- project is usually started by a single developer or a small group
+	- different actors:
+		- maintainer: official person to maintain the code, responsible
+		- core team: small group of leaders behind the project
+		- developers: people who write code on a regular basis
+		- contibutors: people who contribute a single feature or a bug
+		  fix from time to time
+		- users: people who use the software, often organized on
+		  mailinglists, newsgroups, user groups, .. 
+	- main communication medium are mailinglists
+	- every developer can be contacted directly via email
+	- leaders/managers are people with the best technical skills, unlike the 'commercial world' where you need certain diploma, connections, ...
+	- communication is random.  no manager <-> manager talk about technical
+	  stuff they don't understand