> So the new System/360 mainframe line would run the also brand-new OS/360. Bad example. Really bad example: Not even IBM could standardize on a single OS for

> So the new System/360 mainframe line would run the also brand-new OS/360. Bad example. Really bad example: Not even IBM could standardize on a single OS for the System/360. The System/360 went through a few OS iterations before OS/360 came along: OS/360 was late, as recounted in The Mythical Man-Month, so DOS/360 came along, then BOS/360, then TOS/360, and even PCP, which didn't support multiprogramming. Other OSes were CP-67, which became VM, MFT, MVT, and still more OSes on top of that. To this day, there are multiple OSes for the architecture descended from the System/360, including Linux.