Event queue
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An event queue is a software queue that is used to process a sequence of inputs, typically from the user. Each record in the queue contains data detailing the event, including the time of occurrence, the type of input device, and the specific input parameters.
A WIMP environment such as Windows, stores user-generated events in an event queue by some form of prioritization (usually time of event or order of importance). The system then passes each event from the event queue to the target application.