spool

vi. [from early IBM Simultaneous Peripheral Operation On-Line , but is
widely thought to be a backronym ] To send files to some device or program
(a spooler ) that queues them up and does something useful with them later.
Without qualification, the spooler is the print spooler controlling output
of jobs to a printer; but the term has been used in connection with other
peripherals (especially plotters and graphics devices) and occasionally even
for input devices. See also demon.