VSE/POWER Classes
Classes are a means to group jobs or output that require the same set of processing resources. Classes tell VSE/POWER in which partition a job is to run or on what printer an output entry is to be printed. A class is a logical assignment of a job to a partition or output to a printer. For example, you can specify that all jobs with a class specification of 'A' run in partition BG or corresponding output print on device 00E.
Classes are one character definitions. A class can be a character from A - Z or from 0 - 9.