Abstract: The present invention provides a server capable of providing a system in which a client can be reconnected to one server to another to use any output unit in the system without any prior knowledge thereof. The server can select an output unit to which the job request should be sent by referring to correspondence information held therein when the server receives a job request that specifies neither a type of an output unit nor a data format. Also, the server can select an available output unit for data-output in an adequate data format when it receives output data alone, Further, the server can assign a certain output unit to job requests of the same kind sent from the same client, manage the accesses to the output units, distribute output loading according to an output queue to the server, and select the most appropriate server as per condition set by a user.