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Real-time systems such as those designed to control industrial robots, require timely processing; a single processor might be shared between calculations of machine movement, communications, and user interface. [2] Often multitasking operating systems include measures to change the priority of individual tasks, so that important jobs receive ...
ProDOS (operating system for the Apple II series computers) PTS-DOS (MS-DOS variant by Russian company Phystechsoft) TurboDOS (Software 2000, Inc.) for Z80 and Intel 8086 processor-based systems; Multi-tasking user interfaces and environments for MS-DOS compatible operating systems DESQview + QEMM 386 multi-tasking user interface; DESQView/X (X ...
The complementary term, single-user, is most commonly used when talking about an operating system being usable only by one person at a time, or in reference to a single-user software license agreement. Multi-user operating systems such as Unix sometimes have a single user mode or runlevel available for emergency
The UNIX operating system originated as a development of MULTICS for a single user. [40] Because UNIX's source code was available, it became the basis of other, incompatible operating systems, of which the most successful were AT&T 's System V and the University of California 's Berkeley Software Distribution (BSD). [ 41 ]
Digital Research announces Concurrent CP/M-86, aka Concurrent CP/M, a new CP/M-86-compatible single-user multitasking operating system. Concurrent CP/M allows users to go from one screen to another at the push of a key and programs to directly address up to 1 MB of memory. The first implementation will be on the IBM Displaywriter.
AmigaOS is a single-user multitasking operating system. It was one of the first commercially available consumer operating systems for personal computers to implement preemptive multitasking. It was developed first by Commodore International and initially introduced in 1985 with the Amiga 1000. John C. Dvorak wrote in PC Magazine in 1996:
Pilot is a single-user, multitasking operating system designed by Xerox PARC in early 1977. Pilot was written in the Mesa programming language , totalling about 24,000 lines of code . [ 1 ]
The Oberon System [3] is a modular, single-user, single-process, multitasking operating system written in the programming language Oberon. [4] It was originally developed in the late 1980s at ETH Zurich.