(This is particularly surprising because the label doesn't appear
to have anything to do with the flow of control at all!)

While sufficiently astonishing to the unsuspecting reader, this
form of `COME FROM' statement isn't completely general. After
all, control will eventually pass to the following statement. The
implementation of the general form was left to Univac FORTRAN,
ca. 1975 (though a roughly similar feature existed on the IBM 7040
ten years earlier). The statement `AT 100' would perform a
`COME FROM 100'. It was intended strictly as a debugging aid,
with dire consequences promised to anyone so deranged as to use it
in production code. More horrible things had already been
perpetrated in production languages, however; doubters need only
contemplate the `ALTER' verb in {COBOL}.

`COME FROM' was supported under its own name for the first
time 15 years later, in C-INTERCAL (see {INTERCAL},
{retrocomputing}); knowledgeable observers are still reeling
from the shock.

:comm mode: /kom mohd/ /n./ [ITS: from the feature supporting
on-line chat; the term may spelled with one or two m's] Syn. for
{talk mode}.

:command key: /n./ [Mac users] Syn. {feature key}.

:comment out: /vt./ To surround a section of code with comment
delimiters or to prefix every line in the section with a comment
marker; this prevents it from being compiled or interpreted. Often
done when the code is redundant or obsolete, but is being left in