Richard Stallman Mellon's Mach microkernel in a project called GNU Hurd, which has yet to achieve the maturity level required for full POSIX compliance. In 1991, Linus Torvalds, a Finnish student, used the GNU's development tools to produce the free monolithic Linux kernel. The existing programs from the GNU project were readily ported to run on the resultant platform. Most sources use the name "Linux" to refer to the general-purpose operating system thus formed, while Stallman and the FSF call it "GNU/Linux". This has been a longstanding naming controversy in the free software community. Stallman argues that not using GNU in the
Chippewa Operating System Chippewa Operating System The Chippewa Operating System often called COS is the discontinued operating system for the CDC 6600 supercomputer, generally considered the first super computer in the world. The Chippewa was initially developed as an experimental system, but was then also deployed on other CDC 6000 machines. The Chippewa was a rather simple job control oriented system derived from the earlier CDC 3000 which later influenced Kronos and SCOPE. The name of the system was based on the Chippewa Falls research and development center of CDC in Wisconsin. This operating system at Control Data Corporation was distinct from and