3023	 Architecture of the IBM System	 This paper discusses the design considerations for the architectural extensions that distinguish System from System . It comments on some experiences with the original objectives for System 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. computer systems architecture instruction sets virtual storage error handling
