A discussion of operating systems, defined as the whole complex of programming, debugging, and operational aids with which the programmer deals. The components of an operating system are divided into input-output systems, processors, and supervisory systems. Input-output systems are codes used in conjunction with the hardware to get data in and out of the machine. Processors are codes that transform data. Supervisory systems are codes that are responsible for job or task sequencing and for communication between the programmer and the components of the operating system. The provision of a coherent set of communication conventions is emphasized to promote flexibility of construction and use.
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