ⓘ InputOutput Supervisor. The InputOutput Supervisor is that portion of the control program in the IBM mainframe OS360 and successors operating systems which issu ..

                                     

ⓘ Input/Output Supervisor

The Input/Output Supervisor is that portion of the control program in the IBM mainframe OS/360 and successors operating systems which issues the privileged I/O instructions and supervises the resulting I/O interruptions for any program which requests I/O device operations until the normal or abnormal conclusion of those operations.