1854	 On Multiprogramming Machine Coding and Computer Organization	 The author feels that the interrupt feature which is available in most modern computers is a potent source of programming pitfalls and errors and that it therefore may heavily contribute to the unreliability of programs making use of it. A programming scheme is presented which avoids the concept of the interrupt and permits the specification of concurrent or pseudoconcurrent activities in a supposedly more perspicuous manner. It is intended to serve as a basis for the construction of operating systems which are prime examples of programs with concurrent activities. The scheme includes a set of basic instructions for the generation termination and synchronization of parallel processes. A set of routines representing these instructions and thereby simulating a hypothetical machine organization has been implemented and test on the IBM System . Two programs using these instructions written in PL are presented. multiprogramming parallelism interrupt input-output computer organization file handling PL
