2378	 An Operating System Based on the Concept of a Supervisory Computer	 An operating system which is organized as a small supervisor and a set of independent processes are described. The supervisor handles I O with external devices-the file and directory system-schedules active processes and manages memory handle errors and provides a small set of primitive functions which it will execute for a process. A process is able to specify a request for a complicated action on the part of the supervisor usually a wait on the occurrence of a compound event in the system by combining these primitives into a supervisory computer program. The part of the supervisor which executes these programs may be viewed as a software implemented supervisory computer. The paper develops these concepts in detail outlines the remainder of the supervisor and discusses some of the advantages of this approach. operating systems supervisors multiprogramming time-sharing cooperating processes
