• Thumbnail for MS-DOS 4.0 (multitasking)
    MS-DOS 4.0 was a multitasking release of MS-DOS developed by Microsoft based on MS-DOS 2.0. Lack of interest from OEMs, particularly IBM (who previously...
    10 KB (974 words) - 16:32, 23 January 2025
  • Microsoft MS-DOS family: MS-DOS 4.0 (multitasking), a multitasking version in 1986/1987 by Microsoft MS-DOS 4.1 (multitasking), a multitasking version for...
    974 bytes (211 words) - 17:47, 24 May 2020
  • Thumbnail for MS-DOS
    Release date: November 1989 MS-DOS 4.0 (multitasking) and MS-DOS 4.1 – A separate branch of development with additional multitasking features, released between...
    91 KB (9,452 words) - 14:50, 29 April 2025
  • Thumbnail for IBM PC DOS
    windows (for its development of Windows 2.0) and multitasking. Microsoft first licensed, then purchased 86-DOS from Seattle Computer Products (SCP), which...
    37 KB (3,705 words) - 01:09, 30 April 2025
  • graphical programs designed for Windows, as well as existing MS-DOS software. It included multitasking and the use of the mouse, and various built-in programs...
    41 KB (3,851 words) - 14:29, 6 May 2025
  • provided preemptive multitasking on 1980s-era personal computers. Later MS-DOS compatible systems natively supporting preemptive multitasking/multithreading...
    12 KB (1,417 words) - 12:19, 30 April 2025
  • IBM TopView (category DOS software)
    (overlapping and side-by-side) in a multitasking fashion. Microsoft later released a multitasking version of MS-DOS 4.0 (multitasking) from what it learned from...
    16 KB (1,849 words) - 21:46, 19 January 2025
  • SCO in 1987) MS-DOS (developed jointly with IBM, versions 1.0–6.22) Z-DOS MS-Net MS-DOS 4.0 (multitasking) MS-DOS 7 MSX-DOS (developed by MS Japan for the...
    73 KB (8,398 words) - 18:15, 24 April 2025
  • Thumbnail for Multiuser DOS
    Concurrent DOS V60 FlexOS DR DOS PC DOS – IBM's OEM version of (single-user) MS-DOS MS-DOS 4.0 (multitasking) PC-MOS/386 – unrelated multitasking DOS clone...
    63 KB (6,013 words) - 20:25, 3 May 2025
  • "Q100021: Unable to Access Compressed Drives Using DBLBOOT.BAT Disk". Multitasking MS-DOS 4.0, Goupil OEM "expand - Windows CMD". SS64.com. Retrieved 2022-08-27...
    46 KB (6,073 words) - 12:43, 24 April 2025
  • advantage. In late 1987, Windows/386 2.0 introduced a protected mode kernel that can multitask several MS-DOS applications using virtual 8086 mode, but...
    38 KB (4,415 words) - 00:18, 2 May 2025
  • Thumbnail for MS-DOS 7
    MS-DOS 6, Microsoft preannounced in 1994 that MS-DOS 7 would incorporate multitasking and a few other new features planned for the upcoming Windows 4.0,...
    10 KB (1,140 words) - 03:14, 27 August 2024
  • Edition since J2SE 5.0 has included a metadata facility to allow additional annotations that are used by development tools. In DOS, the COM file format...
    15 KB (414 words) - 11:52, 18 March 2025
  • in 1987 MS-DOS 4.0 (multitasking), a multitasking operating system Multitasking DOS sub-system in IBM OS/2, e.g. C:\OS2\MDOS\ Multiuser DOS (aka DR MDOS)...
    1 KB (220 words) - 11:46, 10 October 2024
  • Thumbnail for DR-DOS
    compatible with IBM PC DOS and MS-DOS. Its first release was version 3.31, named so that it would match MS-DOS's then-current version. DR DOS 5.0 was released in...
    121 KB (12,096 words) - 22:17, 9 May 2025
  • DOS Shell is a file manager that debuted in MS-DOS and PC DOS version 4.0, released in June 1988. It was no longer included in MS-DOS version 6, but remained...
    5 KB (554 words) - 17:07, 29 May 2024
  • 8086 mode task.: p.2  The variant had fully preemptive multitasking,: p.2  and allowed several MS-DOS programs to run in parallel in "virtual 8086" CPU mode...
    30 KB (2,604 words) - 13:38, 26 April 2025
  • multiuser multitasking protected mode operating systems was not DOS-based by themselves. Concurrent DOS 386 was later developed to become Multiuser DOS (since...
    32 KB (3,254 words) - 13:11, 2 May 2025
  • Thumbnail for DOS
    retail version of MS-DOS, starting with MS-DOS 5.0. In the mid-1980s, Microsoft developed a multitasking version of DOS. This version of DOS is generally referred...
    56 KB (6,478 words) - 15:15, 30 April 2025
  • Windows 95 (redirect from Windows 4.0)
    retail on August 24, 1995. Windows 95 merged Microsoft's formerly separate MS-DOS and Microsoft Windows products into a single product and featured significant...
    71 KB (7,074 words) - 10:18, 9 May 2025
  • first non Unix multitasking operating system? MSDN Blogs Brooks, Vernon C. "Information about the little known multitasking MS-DOS 4.0". PC DOS Retro. Archived...
    235 KB (7,271 words) - 21:36, 24 April 2025
  • Windows 9x (redirect from MS Windows 9x)
    versions of Windows 9x is 4.x. The internal versions for Windows 95, 98, and Me are 4.0, 4.1, and 4.9, respectively. Previous MS-DOS-based versions of Windows...
    49 KB (6,250 words) - 15:57, 7 May 2025
  • allows DOS-extended programs to run either in a multitasking OS that provides its own DPMI kernel, or directly under bare-metal DOS, in which case DOS extender...
    26 KB (2,741 words) - 23:28, 23 June 2024
  • Thumbnail for Computer multitasking
    (pre-emptive multitasking), or the running program may be coded to signal to the supervisory software when it can be interrupted (cooperative multitasking). Multitasking...
    18 KB (2,082 words) - 12:36, 28 March 2025
  • Thumbnail for CP/M-86
    CP/M-86 (redirect from CP/M-86 1.0)
    CP/M-86 having better memory management but DOS being faster. BYTE speculated that Microsoft reserving multitasking for Xenix "appears to leave a big opening"...
    31 KB (2,534 words) - 04:34, 15 February 2025
  • 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...
    5 KB (662 words) - 14:56, 30 April 2025
  • Thumbnail for DOS Plus
    multitasked, but only one DOS program can be run at a time. DOS Plus attempts to present the same command-line interface as MS-DOS. Like MS-DOS, it has a command-line...
    22 KB (2,049 words) - 09:22, 17 May 2024
  • Thumbnail for Extended memory
    them. The DOS Protected Mode Interface (DPMI) is Microsoft's prescribed method for a DOS program to access extended memory under a multitasking environment...
    9 KB (1,148 words) - 06:34, 2 May 2025
  • Thumbnail for NetWare
    NetWare (redirect from NetWare 4.0)
    operating system developed by Novell, Inc. It initially used cooperative multitasking to run various services on a personal computer, using the IPX network...
    58 KB (7,000 words) - 11:23, 9 May 2025
  • %$SLICE% Used by DOS Plus accepting a numerical value to control the foreground/background time slicing of multitasking programs. See also the DOS Plus command...
    102 KB (10,335 words) - 00:15, 3 April 2025