Print job
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In computing, a print job is a file or set of files that has been submitted to be printed.
Jobs are typically identified by a unique number, and are assigned to a particular destination, usually a printer. Jobs can also have options associated with them such as media size, number of copies and priority.
A file (or set of files) which the print daemon uses so that applications which wish to use the printer do not have to wait until the print job they have sent is finished before they can continue. It also allows multiple users to share a printer. source: http://howtos.linux.com/guides/sag