history of OS

By rodriga

  • single-stream batch processing systems

    The General Motors Research Laboratories implemented the first operating systems in early 1950's for their IBM 701.
    * These were called single-stream batch processing systems because programs and data were submitted in groups or batches.

  • IBSYS

    hey were able to take better advantage of the computer's resources by running several jobs at once. So operating systems designers developed the concept of multiprogramming in which several jobs are in main memory at once; a processor is switched from job to job as needed to keep several jobs advancing while keeping the peripheral devices in use. For example, on the system with no multiprogramming, when the current job paused to wait for other I/O operation to complete, the CPU simply sat idle

  • LSI

    With the development of LSI (Large Scale Integration) circuits, chips, operating system entered in the system entered in the personal computer and the workstation age. Microprocessor technology evolved to the point that it become possible to build desktop computers as powerful as the mainframes of the 1970s. Two operating systems have dominated the personal computer scene: MS-DOS, written by Microsoft, Inc. for the IBM PC and other machines using the Intel 8088 CPU and its successors, and UNIX,

  • RDOS

    DOS (Real-time Disk Operating System) was a real-time operating system released in 1972[1] for the popular Data General Nova and Eclipse minicomputers. RDOS was capable of multitasking, with the ability to run up to 32 "tasks" (similar to threads on modern computer CPUs) simultaneously on each of two grounds (foreground and background) within a 64K memory space. Later versions of RDOS were compatible with Data General's 16-bit Eclipse minicomputer line. OS family Data General

  • RSTS

    RSTS (pronounced as "RIST-ess" or "RIST-uhs") is a multi-user time-sharing operating system, developed by Digital Equipment Corporation ("DEC"), (now part of Hewlett Packard) for the PDP-11 series of 16-bit minicomputers. The first version of RSTS (RSTS-11, Version 1) was implemented in 1970 by DEC software engineers that developed the TSS-8 time-sharing operating system for the PDP-8. The last version of RSTS (RSTS/E, Version 10.1) was released in September 1992. RSTS-11 and RSTS/E are usually

  • ICL VME

    VME (Virtual Machine Environment) is a mainframe operating system developed by the UK company International Computers Limited (ICL, now part of the Fujitsu group). Originally developed in the 1970s (as VME/B, later VME 2900) to drive ICL's then new 2900 Series mainframes, the operating system is now known as OpenVME incorporating a Unix subsystem, and runs on ICL Series 39 and Trimetra,mainframe computers, as well as industry-standard x64 servers.

  • SINTRAN

    SINTRAN III was a real-time, multitasking, multi-user operating system used with Norsk Data computers from 1974. Unlike its predecessors SINTRAN I and II, it was entirely written by Norsk Data. Sintran III was written in NORD PL, intermediate language for Norsk Data computers. SINTRAN was primarily a command line based operating system though there were several shells which could be installed to control the user environment more strictly, by far the most popular of which was USER-ENVIRONMENT.

  • Version 6 Unix

    Also called Version 6 Unix
    *It was released in May 1975 and, like its direct predecessor, targeted the DEC PDP-11 family of minicomputers. It was superseded by Version 7 Unix in 1978/1979..

  • Cray Operating System

    ) was Cray Research's proprietary operating system for its Cray-1 (1976) and Cray X-MP supercomputers, and those platforms' main OS until replaced by UNICOS in the late 1980s. COS was delivered with Cray Assembly Language (CAL), Cray FORTRAN (CFT), and Pascal.

  • OASIS operating system

    was originally developed and distributed in 1977 by Phase One Systems of Oakland, California
    *this is the way the history was presented by David Shirley at the Computer Information Centre, Oasis distributor for the UK in the early 1980s: Timothy Williams developed the Oasis operating system and contracted with Phase One Systems to market and sell the product. Development of the 16-bit product was under way but the product was pre-announced by Pos.