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Multitasking of Microsoft Windows 1.01 released in 1985, here shown running the MS-DOS Executive and Calculator programs. In computing, multitasking is the concurrent execution of multiple tasks (also known as processes) over a certain period of time. New tasks can interrupt already started ones before they finish, instead of waiting for them ...
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 maintenance. Examples of single ...
Multiuser DOS is a real-time multi-user multi-tasking operating system for IBM PC-compatible microcomputers. An evolution of the older Concurrent CP/M-86, Concurrent DOS and Concurrent DOS 386 operating systems, it was originally developed by Digital Research and acquired and further developed by Novell in 1991.
These were basically single-user multi-tasking operating systems, designed for developing and running Process control type applications. OS4000 was first released around 1977. It reused many of the parts of DOS, but added multi-user access, OS4000 JCL Command-line interpreter , Batch processing, OS4000 hierarchical filesystem (although on-disk ...
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.
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 ]
Excellent example as UNIX was designed to be the single user version of the already existing MULTIX - the name reflects this (uniX vs. multiX) - the fact that it later became a multiprogramming, even later a parallel processing OS in some versions, doesn't change the fact, that it originally was single user single task sys., the purpose of ...