It is the source code on Unix Level 6.
The true Unix source code is copyrighted; it doesn't exist anywhere specifically on the net. If you are interested in how something works in Unix you are better off looking at the Linux source code that accomplishes that task.
If I understand your question....vague as it is....yes, the Unix OS source code is free and open source.
Not at all. Both Unix and Windows are trademarked and copyright protected so they cannot share a common code base.
James gosling
proprietary UNIX
No. This is a common misconception. The source code to Unix operating systems has traditionally been licensed to vendors, but the code was never made available to most users. Some of the code from Unix systems prior to System III was released under a BSD license in 2002, but most System III and later code is still proprietary.
Unix in really an umbrella term for a whole category of operating systems that may share some similar code-base. Originally developed in the late 70's by Bell labs, Unix has been forked and re-factored many times by many companies. BSD is a fork of the original Unix system that is currently maintained by Berkley State University, CA. Other Unix forks come from SCO, Oracle, and a few others. On another note, Linux is a free software alternative to Unix, but shares none of the original code.
In a recent court case it was decided that Novell owns the right to the source code.
Unix is primarily written in the C language, with some small snippets of assembler code for low level bootstraps.
Justinian wrote Byzantines legal code
Unix was developed primarily using the C language; there may be a small amount of assembler/machine code used in the boot process as well.