dequeue

from The Free On-line Dictionary of Computing (8 July 2008)
queue
dequeue
enqueue

   <programming> A {first-in first-out} data structure used to
   sequence objects.  Objects are added to the tail of the queue
   ("enqueued") and taken off the head ("dequeued").

   For example, an {operating system} might use a queue to
   serialise {concurrent} demands for a resource such as a
   {printer}, {processor} or communications channel.  Users might
   place files on a print queue and a {background} process or
   "{demon}" would take them off and print them.  Another common
   use is to pass data between an {interrupt handler} and a user
   process.

   (2007-05-18)