The message-queuing or store-and-forward model is basically the message-passing model with one additional feature. Message queuing is asynchronous in a manner similar to a traditional postal system — i.e., the recipient need not be available when the message is sent. Message queuing stores messages at an intermediate node on the network in a queue and then forwards the messages to the intended targets.
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Woffice comes with several built-in demos that you can install in one single click. You can test the available demos here and feel free to challenge any presented feature.