An information processing system having an information processing apparatus and programs includes an application memory unit storing applications executing a series of processes using electronic data, in which program identification information, parameter setup information, and flow identification information are defined, a use screen memory unit storing use screen information of defining a form; a first receiving unit receiving a first request including the application identification information; a first sending unit sending the use screen information; a second receiving unit, an acquiring unit acquiring the flow information identified by the flow identification information included in the second request, and an executing unit causing the program identified by the flow information to be executed using the parameter included in the second request in conformity with the execution order to execute the series of processes using the electronic data based on the information related to the electronic data.