# Queue Applications Queues are a useful representation of problems for different applications. For example, jobs to a network printer is enqueued so that the earlier a job is submitted the earlier it will be printed. Breadth first searches use queues. Queues also have applications in graph theory. Later when we study trees we will make use of a queue to perform a breadth first traversal of a tree. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://cathyatseneca.gitbook.io/data-structures-and-algorithms/queue/queue_applications.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.