[avar]

    > This is rare enough that I'm pushing the recovery
    > of it up near the top of my project queue.

The reader is left to wonder what the software librarian at the Computer History Museum could have possibly found recently that warrants a placement ahead of Unix v4 in their project queue. A copy of Atlantian Unix from the ancient Library of Alexandria?

[gregw2]

Perhaps a prior promise to someone else?

[mbreese]

Or you know... just the definition of a FIFO Queue. I mean, using a FILO Stack to organize your work would certainly be a choice...