
Unix operating system developed and implemented in the 1960s and first released in 1970. The availability and compatibility of higher cause can be used, copied and modified extensively by academic institutions and in business.
GNU project which began in 1984 has a goal to create an operating system that is compatible with Unix and complete and the total is made up of free software. [6] In 1985, Richard Stallman founded Free Software Foundation and the GNU General Public License (GNU General Public License or GNU GPL). Most of the programs that are required by an operating system (such as libraries, compilers, text the editor, and Unix shell window system) is completed in the early 1990s, though elements such as low-level device drivers, and kernel jurik still unfinished at the time . [7] Linus Torvalds once said that if the GNU kernel is available at the time (1991), he will not decide to write their own version.
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