- In VM／370, special statements that determine what is to be done within an EXEC procedure. The statements can be used: to control logic flow; to communicate with a terminal, a user program, or the VM／370 system; or to create output files via the user's virtual punch.; 操作系统VM／370中的专门语句,由它确定一个EXEC过程要执行的任务。这些语句能用来 控制逻辑流,与终端、用户程序或VM／370系统通信,及通过用户的虚拟穿卡机建立输出文件。
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