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The first interactive, general-purpose time-sharing system usable for software development, Compatible Time-Sharing System, was initiated by John McCarthy at MIT writing a memo in 1959. [17] Fernando J. Corbató led the development of the system, a prototype of which had been produced and tested by November 1961. [18]
Time-sharing was first proposed in the mid- to late-1950s and first implemented in the early 1960s. The concept was born out of the realization that a single expensive computer could be efficiently utilized by enabling multiprogramming, and, later, by allowing multiple users simultaneous interactive access. [1]
A real-time operating system (RTOS) is an operating system (OS) for real-time computing applications that processes data and events that have critically defined time constraints. An RTOS is distinct from a time-sharing operating system, such as Unix , which manages the sharing of system resources with a scheduler, data buffers, or fixed task ...
The Compatible Time-Sharing System (CTSS) was the first general purpose time-sharing operating system. [2] [3] Compatible Time Sharing referred to time sharing which was compatible with batch processing; it could offer both time sharing and batch processing concurrently. CTSS was developed at the MIT Computation Center ("Comp Center").
From Time-sharing system evolution: In the 1960s, time-sharing was a new concept, a departure from the batch processing approach previously used with computers. ... Today, of course, virtually all operating systems are time-sharing systems.
Multi-Environment Real-Time (MERT), later renamed UNIX Real-Time (UNIX-RT), [3] 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).
The seminal first-generation time-sharing system was CTSS, first demonstrated at MIT in 1961 and in production use from 1964 to 1974. [1] It paved the way for Multics, CP/CMS, and all other time-sharing environments. Time-sharing concepts were first articulated in the late 50s, particularly as a way to meet the needs of scientific computing.
After the release of Version 10, the Unix research team at Bell Labs turned its focus to Plan 9 from Bell Labs, a distinct operating system that was first released to the public in 1993. All versions of BSD from its inception up to 4.3BSD-Reno are based on Research Unix, with versions starting with 4.4 BSD and Net/2 instead becoming Unix-like.