PURPOSE:To improve the quality of a job control language(JCL)by producing the JCL with the use of a parameter input means, a job step sentence production means, a JCL production means, and an output means. CONSTITUTION:A parameter input part 5 reads the parameter displayed on a CRT 2 and edits the parameter so that a job step sentence production part 6 can process it. Thus the part 6 receives the parameter of a job step sentence from the part 5 and reads the necessary environment information out of a storage 4 to edit a job step sentence. A JCL production part 7 edits a JCL based on the job step sentence produced at the part 6. Then an output device 10 outputs the produced JCL. Thus, the JCL production efficiency is improved and at the same time the JCL quality is also improved.
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