The document discusses the philosophy of open source software. It notes that while open source and free software are not exactly the same, their differences are small as nearly all free software is open source and vice versa. Key aspects of open source discussed include the Cathedral and the Bazaar model, releasing early and often with multiple versions, the "10 Commandments of Open Source", and examples of open source projects like Linux, Mozilla Firefox, Red Hat, and open source integrated library systems.

1. The Philosophy of Open Source Ben Miller Director Sauk City Library

2. Free or Open Source? The term “open source” software is used by some people to mean more or less the same category as free software. It is not exactly the same class of software: they accept some licenses that we consider too restrictive, and there are free software licenses they have not accepted. However, the differences in extension of the category are small: nearly all free software is open source, and nearly all open source software is free. — Free Software Foundation

3. Free or Open Source?

4. The Cathedral & The Bazaar

5. Good programmers know what to write. Great programmers know what to re-write (and re-use). - Eric Raymond

6. User as Developer

7. Linus's Law

8. Release Early, Release Often

9. Multiple Versions

10. Multiple Versions

11. 10 Commandments of Open Source 1. Free Redistribution 2. Source Code 3. Derived Works 4. Integrity of the Author's Source Code 5. No Discrimination against Persons or Groups 6. No Discrimination Against Fields of Endeavor 7. Distribution of License 8. License Must Not Be Specific to a Product 9. License Must Not Restrict Other Software 10. License Must Be Technology Neutral

12. Linus Torvalds – The Benevolent Dictator

13. Mozilla – The Charitable Foundation

14. Red Hat – The Profiteering Consultant

15. Open Source ILS – Koha & Evergreen & etc.

16. What the Fork?