Abstract: A seamless system according to the present invention manages data obtained by associating user identification data accepted from a device with processing identification data indicating a process requested to be executed from the device, registers in the data restart achievement data to be used to achieve restarting of the process indicating processing identification data, acquires the processing identification data and restart achievement data corresponding to the user identification data based on the data when a restart request and the user identification have been accepted, and provides to an originating device making a restart request an execution result of the process indicated by the processing identification data obtained based on the restart achievement data.

Abstract: This invention facilitates providing an information processing service. In an information processing service providing method of the present invention by a computer, an event which requests an additional information processing service associated with an information processing service provided through a network is detected. When the event is detected, a library in which invocation of an additional function of providing the additional information processing service is defined is referred to. On the basis of the reference result of the library, the additional function of providing the additional information processing service is requested to execute processing.