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Free software is a matter of the users' freedom to run, copy, distribute, study, change and improve the software. More precisely, it refers to four kinds of freedom, for the users of the software:
-The freedom to run the program, for any purpose (freedom 0).
-The freedom to study how the program works, and adapt it to your needs (freedom 1). Access to the source code is a precondition for this.
-The freedom to redistribute copies so you can help your neighbor (freedom 2).
-The freedom to improve the program, and release your improvements to the public, so that the whole community benefits. (freedom 3). Access to the source code is a precondition for this.
--The Free Software Foundation http://www.fsf.org/philosophy/free-sw.html
See also OpenSource
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