in OS/VS2 and MVT(and in MFT with subtasking),a priority specification associated with every task in a multitask operation,representing the highest dispatching priority that the task may assign to itself or to any of its subtasks

• 在IBM的操作系统OS/VS2和MVT（以及具有子任务的MFT）中，与多任务运行中的每一个任务相关联的优先级说明，它表示了该任务可以分配给自身或其任何子任务的最高调度优先数