Time-Sharing Systems–Interactive Computing
The CPU is multiplexed
among several jobs that are kept in memory and on disk (the CPU is allocated to
a job only if the job is in memory).
A job swapped in and out
of memory to the disk.
On-line communication
between the user and the system is provided; when the operating system finishes
the execution of one command, it seeks the next “control statement” from the
user’s keyboard.
On-line system must be
available for users to access data and code.
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