“Copyleft is a general method for making a program free software and requiring all modified and extended versions of the program to be free software as well.”

— Richard Stallman

software license copyleft
RS

About Richard Stallman

Activist • American

Richard Matthew Stallman is a prominent American free software movement activist and programmer. He launched the GNU Project in 1983 to create a completely free and open-source Unix-like operating system. Stallman is...

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