Unix operating system - Definition. Was ist Unix operating system
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Was (wer) ist Unix operating system - definition

UNIX VARIANT WITH REAL-TIME OPERATING SYSTEM CAPABILITIES
MERT (operating system); DMERT; UNIX-RTR; MERT; Unix RTR; MERT operating system

UN*X         
  • Simplified history of Unix-like operating systems
OPERATING SYSTEM THAT BEHAVES IN A MANNER SIMILAR TO A UNIX SYSTEM
UNIX-like; Un*x; UNIX-style; Unix-style; Unices; Unix-like operating system; Unx; *NIX; *nix; Unix-alike; Open source Unix; Open source unix; *nice; *nices; Unixoid; *Nix; *n*x; Unix like; UNIX like; Unix clone; Unix-like system; Unix-like OS; Unix-Like; Genetic Unix; Functional Unix; Trademark Unix; Branded Unix; UN*X; UNIX-like operating system; Unixen; Compatibility layers for Unix-like operating systems
<operating system, convention> Used to refer to the Unix operating system (a trademark of AT&T) in writing, but avoiding the need for the ugly (TM) typography. Also used to refer to any or all varieties of Unixoid operating systems. Ironically, lawyers now say that the requirement for the TM-postfix has no legal force, but the asterisk usage is entrenched anyhow. It has been suggested that there may be a psychological connection to practice in certain religions (especially Judaism) in which the name of the deity is never written out in full, e.g. "YHWH" or "G--d" is used. See also glob. (1998-04-17)
Unix-like         
  • Simplified history of Unix-like operating systems
OPERATING SYSTEM THAT BEHAVES IN A MANNER SIMILAR TO A UNIX SYSTEM
UNIX-like; Un*x; UNIX-style; Unix-style; Unices; Unix-like operating system; Unx; *NIX; *nix; Unix-alike; Open source Unix; Open source unix; *nice; *nices; Unixoid; *Nix; *n*x; Unix like; UNIX like; Unix clone; Unix-like system; Unix-like OS; Unix-Like; Genetic Unix; Functional Unix; Trademark Unix; Branded Unix; UN*X; UNIX-like operating system; Unixen; Compatibility layers for Unix-like operating systems
A Unix-like (sometimes referred to as UN*X or *nix) operating system is one that behaves in a manner similar to a Unix system, although not necessarily conforming to or being certified to any version of the Single UNIX Specification. A Unix-like application is one that behaves like the corresponding Unix command or shell.
operating system         
  • bash]] command line. Each command is typed out after the 'prompt', and then its output appears below, working its way down the screen. The current command prompt is at the bottom.
  • File systems allow users and programs to organize and sort files on a computer, often through the use of directories (or "folders").
  • first server]] for the [[World Wide Web]] ran on NeXTSTEP, based on BSD.
  • [[OS/360]] was used on most [[IBM]] mainframe computers beginning in 1966, including computers used by the [[Apollo program]].
  • A screenshot of the [[KDE Plasma 5]] graphical user interface. Programs take the form of images on the screen, and the files, folders (directories), and applications take the form of icons and symbols. A mouse is used to navigate the computer.
  • A kernel connects the application software to the hardware of a computer.
  • PC DOS was an early personal computer OS that featured a command-line interface.
  • Privilege rings for the [[x86]] microprocessor architecture available in [[protected mode]]. Operating systems determine which processes run in each mode.
  •  archive-date = August 15, 2010 }}</ref>
  • Ubuntu]], desktop [[Linux distribution]]
  • Many operating systems can "trick" programs into using memory scattered around the hard disk and RAM as if it is one continuous chunk of memory, called virtual memory.
SOFTWARE THAT MANAGES COMPUTER HARDWARE RESOURCES
Operating System; Operatingsystem; Operating systems; Operating Systems; Operation system; Computer operating sysem; General-purpose operating system; Desktop operating system; Desktop OS; Desktop os; Computer operating system; Operative system; Operating System Types; GPOS; OPSYS; Desktop operating systems; Desktop system; Computer OS; Library OS; Library Operating Systems
(operating systems)
The operating system of a computer is its most basic program, which it needs in order to function and run other programs. (COMPUTING)
N-COUNT

Wikipedia

Multi-Environment Real-Time

Multi-Environment Real-Time (MERT), later renamed UNIX Real-Time (UNIX-RT), is a hybrid time-sharing and real-time operating system developed in the 1970s at Bell Labs for use in embedded minicomputers (especially PDP-11s). A version named Duplex Multi Environment Real Time (DMERT) was the operating system for the AT&T 3B20D telephone switching minicomputer, designed for high availability; DMERT was later renamed Unix RTR (Real-Time Reliable).

A generalization of Bell Labs' time-sharing operating system Unix, MERT featured a redesigned, modular kernel that was able to run Unix programs and privileged real-time computing processes. These processes' data structures were isolated from other processes with message passing being the preferred form of interprocess communication (IPC), although shared memory was also implemented. MERT also had a custom file system with special support for large, contiguous, statically sized files, as used in real-time database applications. The design of MERT was influenced by Dijkstra's THE, Hansen's Monitor, and IBM's CP-67.

The MERT operating system was a four-layer design, in decreasing order of protection:

  • Kernel: resource allocation of memory, CPU time and interrupts
  • Kernel-mode processes including input/output (I/O) device drivers, file manager, swap manager, root process that connects the file manager to the disk (usually combined with the swap manager)
  • Operating system supervisor
  • User processes

The standard supervisor was MERT/UNIX, a Unix emulator with an extended system call interface and shell that enabled the use of MERT's custom IPC mechanisms, although an RSX-11 emulator also existed.

Beispiele aus Textkorpus für Unix operating system
1. Sun prospered in the late 1''0s as the leading seller of servers running the Unix operating system.