A generalized supervisor for a time-shared operating system

An operating system may be considered an environment defined by a set of software processors operating in conjunction with the facilities of one or more central processors and associated devices. Its function is to allow its users to effectively command these facilities. A time-shared multiple access operating system provides apparent simultaneous availability of its facilities to a large number of users. The Supervisor of such an operating system must provide effective control of all of the facilities available to the system.