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  2. Computer multitasking - Wikipedia

    en.wikipedia.org/wiki/Computer_multitasking

    Possibly the earliest preemptive multitasking OS available to home users was Microware's OS-9, available for computers based on the Motorola 6809 such as the TRS-80 Color Computer 2, [8] with the operating system supplied by Tandy as an upgrade for disk-equipped systems. [9] Sinclair QDOS on the Sinclair QL followed in 1984, but it was not a ...

  3. Multi-user software - Wikipedia

    en.wikipedia.org/wiki/Multi-user_software

    Multi-user software is computer software that allows access by multiple users of a computer. [1] Time-sharing systems are multi-user systems. Most batch processing systems for mainframe computers may also be considered "multi-user", to avoid leaving the CPU idle while it waits for I/O operations to complete.

  4. Cooperative multitasking - Wikipedia

    en.wikipedia.org/wiki/Cooperative_multitasking

    Cooperative multitasking was the primary scheduling scheme for 16-bit applications employed by Microsoft Windows before Windows 95 and Windows NT, and by the classic Mac OS. Windows 9x used non-preemptive multitasking for 16-bit legacy applications, and the PowerPC Versions of Mac OS X prior to Leopard used it for classic applications. [1]

  5. List of operating systems - Wikipedia

    en.wikipedia.org/wiki/List_of_operating_systems

    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 ...

  6. List of disk operating systems called DOS - Wikipedia

    en.wikipedia.org/wiki/List_of_disk_operating...

    86-DOS (a.k.a. QDOS, created 1980), an operating system developed by Seattle Computer Products for its 8086-based S-100 computer kit, heavily inspired by CP/M; Concurrent DOS (a.k.a. CDOS, Concurrent PC DOS and CPCDOS) (since 1983), a CP/M-86 and MS-DOS 2.11 compatible multiuser, multitasking DOS, based on Concurrent CP/M-86 developed by Digital Research

  7. Real-time operating system - Wikipedia

    en.wikipedia.org/wiki/Real-time_operating_system

    A multitasking operating system like Unix is poor at real-time tasks. The scheduler gives the highest priority to jobs with the lowest demand on the computer, so there is no way to ensure that a time-critical job will have access to enough resources. Multitasking systems must manage sharing data and hardware resources among multiple tasks.

  8. Multithreading (computer architecture) - Wikipedia

    en.wikipedia.org/wiki/Multithreading_(computer...

    Conceptually, it is similar to cooperative multi-tasking used in real-time operating systems, in which tasks voluntarily give up execution time when they need to wait upon some type of event. This type of multithreading is known as block, cooperative or coarse-grained multithreading.

  9. Time-sharing system evolution - Wikipedia

    en.wikipedia.org/wiki/Time-sharing_system_evolution

    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]