When developing a new hardware generation of unified System/360 (or S/360) computers, IBM had originally committed to delivering a single operating system, OS/360, also compatible with low-end machines; but hardware was already available and the OS/360 project fell further and further behind schedule, as described at length by Fred Brooks.
The M65MP option of OS/360 used the Direct Control feature of the S/360 to generate an interrupt on another processor; on S/370 and its successors, including z/Architecture, the SIGNAL PROCESSOR instruction provides a more formalized interface.
Xbox 360 | Anderson Cooper 360° | U2 360° Tour | IBM System/360 | Lycoming O-360 | XBox 360 | Subaru 360 | Texas State Highway 360 | Studio 360 | Short 360 | OS/360 and successors | Nevada State Route 360 | List of Xbox games compatible with Xbox 360 | Crime 360 | Anderson Cooper 360 | 360 | Xbox 360 technical problems | XBOX 360 | The 360 Degree Music Experience | Stereo "360 Sound" | Porsche 360 | No. 360 Squadron RAF | IBM System/360 Model 40 | Ferrari 360 | Continental IO-360 | Child advocacy 360 | Battle 360° | 360 State Street | 360 (rapper) |
The fixed head area could also utilized for TSO "swap" data (MVT) and system swap data (MVS) wherein the swap data consisted of a condensed set of pointers to the remaining system data, which was "demand paged", as required, not "swapped".
The Spooler was a systems software operating system package that provided spooling facilities for the IBM System/370 running DOS/VS, DOS/VSE environment, and IBM System/360 running DOS/360 or retrofitted with modified DOS/360, such as TCSC's EDOS.