As a result, a Unix community began to coalesce to help members, and patch and extend Unix. Small charges covered the shipping and packaging and a “reasonable royalty.” A Proliferation of Unixesīecause Unix was provided “as-is,” it came without support. So, the company did something remarkable for that time: distributed Unix as source code with a liberal license. Immediately they received requests for copies of the operating system.īound by a consent decree that dated back to 1956, AT&T had to eschew “any business other than the furnishing of common carrier communications services.” Unix didn’t qualify as something AT&T could profit from. That same year, Ken Thompson and Dennis Ritchie, two of the core Unix architects, presented a paper at a conference about operating systems. This made the operating system much more portable and easier to transfer to different hardware platforms.
Unix was created fifty years ago at Bell Labs, a research and development company owned by AT&T. Fast-forward to 1973 and Version 4 of Unix, which was rewritten in the C programming language. Who gets to decide if something is Unix or UNIX, and what criteria do they use? What is the lineage of macOS? How much of that hereditary material is still present in today’s macOS, and does it matter? Before we can begin to answer whether something is UNIX, Unix, or Unix-like, we need to be comfortable with what those terms mean.
This subject raises a bunch of different questions.
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