The first or only module of a program coded with the MSP/7 library macros. This module must contain system routines required in every storage load, and can include system routines required by more than one module of the program.
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- IBMSystem/7的模块系统程序(MSP/7)库宏指令编码的程序的第一个或唯一一个模块,该模块必须包括每次存储装入所要求的系统例行程序,也可以包括多个程序模块所要求的系统例行程序。