START, STOP and CANCEL JOBS
Using the START command, you can start jobs from the console. You can also use the START command to cause the JES internal reader facility to read a job from a tape or direct access volume.
Using the STOP command, you can stop a job if the programmer has coded a stop routine in the program.
Using the CANCEL and FORCE commands, you can cancel a job that is executing. If the job is not currently executing, use a subsystem command to cancel it.
Use the MODIFY command to pass information to a job. This information may be used by the currently running program. Note that you can only pass information that is already defined in the currently running program.