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.
It is the source code on Unix Level 6.
If I understand your question....vague as it is....yes, the Unix OS source code is free and open source.
In a recent court case it was decided that Novell owns the right to the source code.
Not at all. Both Unix and Windows are trademarked and copyright protected so they cannot share a common code base.
Almost all Unix systems are proprietary; they are not open source, and you usually only get the binary modules, not the source code.
Unix is not open source, it is proprietary. Linux is the open-source version of Unix.
Unix is NOT open source, it is proprietary copyrighted code owned by AT&T and you must purchase a license to use it, as you do on Windows and Mac OS X.However both Linux and GNU are open source OSs with equivalent functionality to Unix.
proprietary UNIX
Too difficult to answer here. I would find the source code and use that (if you really had to). Might require a 'port' to another operating system if it wasn't Unix based.
A source file is typically a readable, Ascii file, that is not the result of a compiler or translator to binary machine code.
In a sense it was free; in the early to mid-70s you could get a copy of Unix (without source code) from Bell Labs with only the cost of the postage for the materials.
Not in their entirety. Some certified Unix systems like Solaris or Mac OS X use open-source software in their core product, or have released portions of their code under an open-source license.