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This document provides a history of open source software, tracing its origins back to 1969 with the creation of Unix at Bell Labs. Key events included the early collaborative development of Unix and its licensing at low cost, encouraging modifications and sharing of code. However, in the 1980s AT&T commercialized Unix, restricting access to source code. This led Richard Stallman to found the Free Software Foundation and create the GNU Public License to promote freely modifiable source code. Overall, the document outlines the evolution from early collaborative development models to more restrictive commercial models, setting the stage for modern open source software.











































