Simple Batch System (ต่อ)•From the View of the Processor•Processor executes instructions from the portion of main memory containing the monitor•These instructions cause the next job to be read in another portion of main memory•The processor executes the instruction in the user’s program until it encounters an ending or error condition•Either event causes the processor to fetch its next instruction from the monitor program•The monitor handles setup and scheduling •A batch of jobs is queued up and executedas rapidly as possible with no idle time•Job control language (JCL)•Special type of programming language used to provide instructions to the monitor