A comprehensive collection of control program options,language processors, I/O supports, application programs, and service routines, designed to meet the needs of users who require the extensive facilities of a large operating system.; 控制程序選件、語言處理程序、輸入輸出支持程序、應(yīng)用程序及服務(wù)例行程序的一種綜合匯集，以 適合要求大型操作系統(tǒng)擴(kuò)充功能的用戶需要。