Actually, there may be several different keyboard interrupts.
On many systems,
the ``interrupt signal'' referred to as SIGINT
is generated by control-C.
Unix systems also have SIGQUIT,
usually generated by control-\
SIGINT and SIGQUIT can
be bound to any key).
MS-DOS systems also have control-BREAK,
which usually results in SIGINT.
On the Macintosh,
SIGINT is sometimes generated by command-period.
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