Architecture of the IBM System/370 This paper discusses the design considerations for the architectural extensions that distinguish System/370 from System/360. It comments on some experiences with the original objectives for System/360 and on the efforts to achieve them, and it describes the reasons and objectives for extending the architecture. It covers virtual storage, program control, data-manipulation instructions, timing facilities, multiprocessing, debugging and monitoring, error handling, and input/output operations. A final section tabulates some of the important parameters of the various IBM machines which implement the architecture. CACM January, 1978 Case, R. Padges, A. computer systems, architecture, instruction sets, virtual storage, error handling 6.0 6.21 CA780107 JB March 28, 1978 5:16 PM 3023 5 3023 3023 5 3023 3023 5 3023