PURPOSE: To attain quick and accurate corresponding job start by starting a job by a corresponding computer system based on a job name and a computer system name decided by a start job deciding means and a computer system decision means.

CONSTITUTION: When the registration of a job to be started by a start job deciding means 3, a computer system deciding means 4 references a start job name registration table 71 to decide the computer system name starting the job start request means 5 generates a command string for job start including device number information of a medium to start the job based on the name and computer system name by the start job deciding means 3 and the computer system deciding means 4 and issues the command string to start an object job.