first in first out

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English[edit]

Alternative forms[edit]

Noun[edit]

first in first out (uncountable)

  1. (accounting) A method of inventory accounting that values items withdrawn from inventory at the cost of the oldest item assumed to remain in inventory.
  2. (operations) A policy of serving first what has arrived for service first.
  3. (computing) A type of queue data structure in which the oldest added items are retrieved first.

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