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The operating system provides an interface between an application program and the computer hardware, so that an application program can interact with the hardware only by obeying rules and procedures programmed into the operating system. The operating system is also a set of services which simplify development and execution of application programs.
TOS/360 (IBM's Tape Operating System) Livermore Time Sharing System (LTSS) Multics (MIT, GE, Bell Labs for the GE-645) (announced) Pick operating system; SIPROS 66 (Simultaneous Processing Operating System) [6] THE multiprogramming system (Technische Hogeschool Eindhoven) development; TSOS (later VMOS) 1966 DOS/360 (IBM's Disk Operating System)
This new operating system was initially without organizational backing, and also without a name. The new operating system was a single-tasking system. [17] In 1970, the group coined the name Unics for Uniplexed Information and Computing Service as a pun on Multics, which stood for Multiplexed Information and Computer Services.
MS-DOS (acronym for Microsoft Disk Operating System) is an operating system for x86-based personal computers mostly developed by Microsoft.Collectively, MS-DOS, its rebranding as IBM PC DOS, and some operating systems attempting to be compatible with MS-DOS, are sometimes referred to as "DOS" (which is also the generic acronym for disk operating system).
IBM's key innovation in operating systems in this class (which they call "mid-range"), was their "CPF" for the System/38. This had capability-based addressing , used a machine interface architecture to isolate the application software and most of the operating system from hardware dependencies (including even such details as address size and ...
The scheduler is an operating system module that selects the next jobs to be admitted into the system and the next process to run. Operating systems may feature up to three distinct scheduler types: a long-term scheduler (also known as an admission scheduler or high-level scheduler), a mid-term or medium-term scheduler, and a short-term scheduler.
This is an accepted version of this page This is the latest accepted revision, reviewed on 25 February 2025. Family of Unix-like operating systems This article is about the family of operating systems. For the kernel, see Linux kernel. For other uses, see Linux (disambiguation). Operating system Linux Tux the penguin, the mascot of Linux Developer Community contributors, Linus Torvalds Written ...
These systems ran a variety of clone operating systems - DEMOS (based on BSD Unix), MOS VP (based on VAX/VMS) or MOS VP RV (based on VAXELN). [ 32 ] The NCI-2780 Super-mini, also sold as Taiji-2780, is a clone of the VAX-11/780 developed by North China Institute of Computing Technology in Beijing.