You've done it. You've installed DOS 360 in a manner similar to that used when DOS was young. Or not so young, really; DOS 360 release 26.2 was the last version of DOS for IBM System 360 mainframes. DOS release 27 was a System 370 release.
The Operation section provides startup, operation, and shutdown instructions for DOS/360 and for POWER II.
The Sort/Merge section includes instructions and JCL examples for the full-function Disk Sort/Merge program; this program processes tape or disk files and uses disk-based work files for sort operations (merge operations do not require work files).