This document provides an overview of key concepts related to open source software including Coasean economic logic, power law distributions, and publish-then-filter models. It also includes statistics on sourceforge downloads and lines of Linux kernel code over time as well as photos and attribution information.

1. Prepared by Carl Schroedl for:
LIS 201 – The Information Society
University of Wisconsin - Madison

3. Key Concepts
 Coasean Economic
Logic
 Power Law
Distributions
 Publish-Then-Filter

4. Web Server Operating Systems

5. “I'm doing a (free) operating system
(just a hobby, won't be big and
professional like gnu)” … “I'd like to
know what features most people
would want. Any suggestions are
welcome, but I won't promise I'll
implement them :-)” … “It is NOT
portable (uses 386 task switching
etc), and it probably never will
support anything other than AT-
harddisks, as that's all I have :-(.”

6. Tux, the GNU/Linux
mascot

9. sourceforge.net Downloads
Project Rank

10. Lines of Linux Kernel Code
Developer Rank

20. http://www.opensource.org/

21. Photo Credits In Order of Appearance
http://en.wikipedia.org/wiki/File:Here_Comes_Everybody.jpg
http://en.wikipedia.org/wiki/File:ClayShirkyJI1.jpg
http://gs.statcounter.com/#browser-ww-monthly-201012-201111-bar
http://images.dailytech.com/nimage/22099_Linus_Torvalds.jpg
http://www.linux-mag.com/s/i/topics/tux.jpg
http://stallman.org/rms-bw.jpeg
http://www.gnu.org.ua/graphics/winkler-gnu.png
https://ssl.netcraft.com/ssl-sample-report//CMatch/Cosld_all
https://ssl.netcraft.com/ssl-sample-report//CMatch/img_all
http://saltydroid.info/wp-content/uploads/2010/09/the-unicorn-of-power-laws.jpg
http://en.wikipedia.org/wiki/File:Coase.png
http://perspectives.3ds.com/wp-content/uploads/co-creation.jpg
http://sarahdavies.cc/wp-content/uploads/2008/08/coasian.jpg
http://blog.phatsite.com/wp-content/uploads/2011/02/1298232007.jpg
http://www.uk2.net/blog/wp-content/uploads/Debian.jpg
http://2alegacyconsulting.com/blog/wp-content/uploads/2010/07/effective-internet-
marketing.jpg
http://dirkriehle.com/wp-content/uploads/2008/03/oss-2008-total-growth-final-web.pdf
http://wireless.ictp.it/simulator/img/world.jpg
http://www.schreibernet.com/blog.nsf/dx/Patent-Law.jpg/$file/Patent-Law.jpg
http://linux.devicegadget.com/wp-content/uploads/2010/04/SUSENovell.png
http://www.techbreak.net/images/open-source-software-icons1.jpg
http://www6.bibl.ulaval.ca:8080/etd2006/pages/papers/Art_Ryhno/pix/icons.jpg
http://www.opensource.org/files/garland_logo.png