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    Project Monterey, the project to create a common UNIX platform.

    Project Monterey was distinct from OSF/1, the project to create a common UNIX platform.

    OSF/1 was distinct from 3DA, the project to create a common UNIX platform.

    3DA was distinct from SVR4, the project to create a common UNIX platform.

    Thankfully we didn’t need to worry about this plethora of different common UNIX platforms, because vendors could simply declare compatibility with the One True Unix Standard: SVR4-X/Open-POSIX-Single Unix Specification-COSE-SysV!

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      I’m sure there’s an xkcd on this somewhere.

      I should try to collect all the One True Unices in a future post.

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        Speaking of, who owns the “UNIX” trademark nowadays?

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          I think The Open Group nowadays.

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            Don’t they exist to gatekeep the name Unix to ensure the BSD’s never can lay claim to their heritage as Unix?

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              I suspect it’s just an intellectual property line item in The Open Group’s asset list.

              • 1 (one) trademark “UNIX” - $1,500,000

              (price is just a wild guess)

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      The ‘BTDT’ in the title stands for Been There, Done That. (Took me a minute.)

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        It’s odd to regard Compaq as one of ‘the usual hangers-on’. At the time, Compaq had just bought Digital (DEC) and so were both a UNIX vendor and one of the CPU manufacturers who had jumped on the Itanic (to the extent that they refused to release performance numbers of the cancelled Alpha because it made Itanic look too bad).

        I note that my late 2013 MacBook Pro is also in the not-supported-by-Monterey list. The late 2019 model looks like the first one released since mine that are actually better, so I’ll probably upgrade at some point. They’re not better by a large enough margin to justify the price delta though, so I may just pick up a second-hand one in a few years…