^[156] Look for F_NOTIFY under fcntl(2).

^[157] This paragraph is based on a 1984 analysis by Henry Spencer. He went on to note that job control was necessary and appropriate for POSIX.1 and later Unix standards to consider precisely because it oozes its way into every program, and hence has to be thought about in any application-to-system interface. Hence, POSIX's endorsement of a mis-design, while proper solutions were “out of scope” and hence were not even considered.

^[158] There is a project site for screen(1) at https://www.math.fu-berlin.de/~guckes/screen/.

^[159] For nonprogrammers, throwing an exception is a way for a program to bail out in the middle of a procedure. It's not quite an exit because the throw can be intercepted by catcher code in an enclosing procedure. Exceptions are normally used to signal errors or unexpected conditions that mean it would be pointless to try to continue normal processing.

^[160] https://www.eros-os.org/

^[161] The operating systems of the Apple Newton, the AS/400 minicomputer and the Palm handheld could be considered exceptions.