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Is Free Software Open Source?

No. Some software or applications are free to use but they are not open source. For example, Microsoft Security Essentials is free to use on licensed Microsoft Windows operating system but you can not get the source code. LibreOffice is the power-packed free and open source personal productivity suite for Windows, Macintosh and GNU/Linux. You can download LibreOffice's source code to look at, modify, build and run.

The Open Source Definition:
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

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