1132
1135
Operating System / Multiprogramming with a Fixed number of Tasks (OS, IBM S/360), "OS/MFT"
1135
Operating System / Multiple Virtual Space (OS, IBM, S/370, OS/MVT, successorr, OS/VS-2), "OS/MVS"
1138
Operating System / Multiple Virtual Space (OS, IBM, S/370, OS/MVT, successorr, OS/VS-2), "OS/MVS"
1138
1141
Operating System / Multiprogramming with a Variable number of Tasks (OS, IBM, S/360, S/370), "OS/MVT"