Submitted by György Chityil ... on Fri, 01/19/2018 - 18:05 Hierarchy: NounDescription: {{context|operations}} A policy of serving first what has arrived for service first.Ngram: first in first outNgram Text: first in first outSource: WiktionaryIssue: 0Wiktionary tag: operationsNgram Count: 4Wikokit WikiText ID: 633696