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Computing (FOLDOC) dictionary (also found in English - Vietnamese, English - English (Wordnet), )
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operating system A Unix system call used by a process
(the "parent") to make a copy (the "child") of itself. The
child process is identical to the parent except it has a
different process identifier and a zero return value from
the fork call. It is assumed to have used no resources.
A fork followed by an exec can be used to start a different
process but this can be inefficient and some later Unix
variants provide vfork as an alternative mechanism for this.