Queues

A queue is a list of objects that are waiting to be processed.
Examples of AS/400 queues:
    1. Job queues: where batch jobs wait
    2. Message queues: where messages wait
    3. Output queues: where spool files wait to print
    4. Data queues: Data queues are used to communicate and store data used by several programs either within a job or between jobs. Multiple jobs can send or receive data from a single queue.