1. Open Source Software TahaPatni Hector Lopez Valencia December 11th 2009

2. Table of Contents What is Open Source Software History Open Source Definition Open Source Licensing Open Source vs. Other Software How Open Source Software is developed Pros and Cons Conclusion References Thank You and Questions

3. What is Open Source Software Open Source Software: “Open source usually refers to software that is released with source code under a license that ensures that derivative works will also be available as source code, protects certain rights of the original authors, and prohibits restrictions on how the software can be used or who can use it.”(1)

4. History Open Source Movement Launched in 1998 By Eric S Raymond and others Free Software was too ambiguous Open Source Definition was Introduced OSI was formed (2)

5. Common open source software Firefox VLC media player Thunderbird phBB bulletin boards Bittorrent Linux

7. Source Code

8. Derived Works

9. Integrity of the Author’s Source Code

10. No Discrimination Against Person or Groups

11. No Discrimination of Fields Endeavour

12. Distribution of License

13. License must not be Specific to a Product

14. License must not restrict other Software

16. Most Common licenses Apache License: 2.0 BSD Licenses GNU General Public Licenses (GPL) GNU Library or “Lesser” General Public License MITT License Mozilla Public License (MPL) Eclipse Public License

17. Major Differences in Licenses Each License decides how your software is going to be used Some Licenses always remain free (GPL) Business Friendly Licenses (BSD, Apache)(9)

18. Open Source Software Vs Other Software Closed Source/Proprietary No Source Code Available to view Cost Involved Includes Technical Support No Modifications Allowed Source Available Only Able to View The Code

19. Open Source Software Vs Others CONTD Free Software All Free Software's are OSS Ambiguity of the term Social and Moral(8)

20. How The Open Source Software is developed 6

22. Conclusion and why should you care? With Open Source Software you can Share Open Source Programs Develop in a group Less problems, Improved Software’s, Better features New Business Opportunities

23. References (1) http://onlamp.com/onlamp/2005/09/15/what-is-opensource.html (2) http://oss-broschuere.berlios.de/broschuere/broschuere-en.html (3) http://opensource.org/docs/osd (4) http://en.wikipedia.org/wiki/Open_source_software#cite_note-4 (5) http://www.airs.com/ian/essays/licensing/licensing.html (6) http://www.cippic.ca/open-source/ (7) http://www.helium.com/items/111610-the-pros-and-cons-of-open-source-software (8) http://www.gnu.org/philosophy/free-sw.html (9) http://www.supportforge.biz/content/view/16/33/ (10) http://is.pasok.gr/si/software.html

24. Thank You!Any questions?