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queue
queue A queue is a waiting system in which arriving customers seek service, may have to wait if the server is unavailable, and may retry later if they do not enter service immediately.
A queue is a waiting system in which arriving customers seek service, may have to wait if the server is unavailable, and may retry later if they do not enter service immediately. In the model described here, the queue can include batch arrivals, repeat attempts for service, and slower service during a working vacation.