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Multitasking operating system released 1986
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
MS-DOS_4.0_(multitasking)
MSDOS-like operating system
compatible with IBM PC DOS and MS-DOS. The first release was version 3.31, named to match MS-DOS's then-current version. DR DOS 5.0 was released in 1990
DR-DOS
Topics referred to by the same term
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
DOS_4
Computer operating system
PC DOS and MS-DOS was DOS, which is also the generic term for disk operating system, and is shared with dozens of disk operating systems called DOS. The
IBM_PC_DOS
Events in the history of 16-bit x86 DOS-family disk operating systems
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
Timeline of DOS operating systems
Timeline_of_DOS_operating_systems
Microsoft computer operating system
MS-DOS (/ˌɛmˌɛsˈdɒs/ em-ess-DOSS; acronym for Microsoft Disk Operating System, also known as Microsoft DOS) is an operating system for x86-based personal
MS-DOS
1985 Microsoft operating system version
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
Windows_1.0
1990 Microsoft operating system version
kernel that can multitask several MS-DOS applications using virtual 8086 mode, but all Windows applications still run in a shared virtual DOS machine. As
Windows_3.0
Family of CP/M- and DOS-compatible multi-user multi-tasking operating systems
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
Multiuser_DOS
Computer operating system
sound). Unlike MS-DOS, Windows allowed users to execute multiple graphical applications at the same time, through cooperative multitasking. Windows implemented
Microsoft_Windows
Topics referred to by the same term
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 (a.k.a. DR
MDOS
Techniques employed to give access to more than 640 kibibytes
the HIMEM.SYS device driver. Starting with versions 5.0 of DR-DOS (1990) and of MS-DOS (1991), parts of the operating system could be loaded into HMA
DOS_memory_management
User-definable variable associated with each running process in many operating systems
%$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
Environment_variable
1995 Microsoft operating system version
operating systems, Windows 95, which replaced Windows 3.1, merged Microsoft's MS-DOS and Microsoft Windows operating systems into a single product, and featured
Windows_95
Operating environment created by Digital Research
the GEM system capable of multitasking. This started with X/GEM based on GEM/1, but this required use of one of the multitasking CP/M-based operating systems
GEM_(desktop_environment)
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
List_of_operating_systems
Discontinued modular real-time multiuser multitasking operating system
FlexOS is a discontinued modular real-time multiuser multitasking operating system (RTOS) designed for computer-integrated manufacturing, laboratory, retail
FlexOS
Running on top of MS-DOS, it allowed users to run multiple DOS programs concurrently in windows. It was the first program to bring multitasking and windowing
History of the graphical user interface
History_of_the_graphical_user_interface
Discontinued computer operating system for x86 processors
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"
CP/M-86
Alphabetical assignment to logical drives on computers (e.g., C:\)
DOS Plus AMSDOS DOS family 86-DOS, MS-DOS, PC DOS DR DOS, Novell DOS, PalmDOS, OpenDOS ROM-DOS PTS-DOS, S/DOS FreeDOS PC-MOS/386 SISNE plus GEMDOS, TOS
Drive_letter_assignment
Computers derived from the IBM PC
firmware interface, or have their CSMs disabled, cannot natively run MS-DOS since MS-DOS depends on a BIOS interface to boot. Only the Macintosh had kept
IBM_PC_compatible
American multinational technology company
Altair 8800, Microsoft rose to dominate the PC operating system market with MS-DOS in the mid-1980s, followed by Windows. The company's 1986 initial public
Microsoft
Impact of 1981 American microcomputer model
developer of its primary operating system, IBM PC DOS—licensed the operating system generically as MS-DOS to over 70 other companies. The first computer
Influence of the IBM PC on the personal computer market
Influence_of_the_IBM_PC_on_the_personal_computer_market
Signal in the system bus of an x86-based computer system
that should work with most or all windowing and multitasking systems. [...] (426 pages) "Caldera OpenDOS Machine Readable Source Kit (M.R.S) 7.01". Caldera
A20_line
modern version of Microsoft's BASIC interpreter more closely resembled the MS-DOS GW-BASIC, featuring PC-like functionality. The Model 4 could run the industry-standard
List of TRS-80 and Tandy-branded computers
List_of_TRS-80_and_Tandy-branded_computers
Operating system of the Atari ST range of computers
GEM GUI running on top of GEMDOS. Features include a flat memory model, MS-DOS-compatible disk format (starting with TOS 1.04), support for MIDI, and a
Atari_TOS
Disk operating system
4.51 (Sep. 2026) SpartaDOS X is a non-multitasking operating system intentionally modeled after and closely resembling MS-DOS in look and feel. It consists
SpartaDOS_X
Early personal computer by Durango Systems Corporation
five years before this filename was used for a similar purpose under MS-DOS/PC DOS 2.0 in 1983. The F-85 used single-sided 5¼-inch 100 tpi diskette drives
Durango_F-85
Range of computers
The ICL/MS-DOS 4.00 Multitasking operating system on the ICL M60 machines has support for MS-WINDOWS 1.03. The ICL/MS-DOS 4.10 Multitasking operating
ICL_DRS
1986 personal computer by Radio Shack
PC DOS, Digital Research's DR-DOS and GEM, and 16-bit versions of Microsoft Windows (up to version 3.x). Still later IBM's graphical multitasking OS/2
Tandy_3000
Computer network operating system by Novell
operating system developed by Novell, Inc. It initially used cooperative multitasking to run various services on a personal computer, using the IPX network
NetWare
derivatives, Linux, and BSD) EXE – DOS executable (.exe: used in DOS) EXE – New Executable (used in multitasking ("European") MS-DOS 4.0, 16-bit Microsoft Windows
List_of_file_formats
Tech Products of All Time", PC World, USA "Anniversary: Is Tetris Really 40 This Year?". Time Extension. June 24, 2024. Archived from the original on
Timeline of computing 1980–1989
Timeline_of_computing_1980–1989
Software that manages computer hardware resources
operating system from Microsoft, which IBM sold as IBM PC DOS and Microsoft branded as MS-DOS (MicroSoft Disk Operating System) and was widely used on
Operating_system
1994 video game
Time Warner Interactive in 1994. Originally developed for the Amiga and MS-DOS compatible operating systems by Mirage's Instinct Design, it was ported
Rise_of_the_Robots
Class of microcomputers
industry-standard MS-DOS software on affordable, user-friendly PCs was anticipated as a source of new sales. Furthermore, many in the industry felt that MS-DOS would
Home_computer
Programmable machine that processes data
computers, the principal use for multitasking was to allow many people to share the same computer. Seemingly, multitasking would cause a computer that is
Computer
Microsoft operating system family
starting with Windows XP. Partial MS-DOS and Windows 16-bit compatibility is achieved on IA-32 via an integrated DOS Virtual Machine—although this feature
Windows_NT
1980–2014 American multinational software and services company
x86-port of their Mac OS on top of a multitasking DR DOS. Novell had already abandoned Digital Research's Multiuser DOS in 1992. The three former Master Value
Novell
Firmware for hardware initialization and OS runtime services
of MS-DOS, PC DOS or DR-DOS contain a file called variously "IO.SYS", "IBMBIO.COM", "IBMBIO.SYS", or "DRBIOS.SYS"; this file is known as the "DOS BIOS"
BIOS
Microsoft Windows versions Comparison of mobile operating systems Comparison of MS-DOS compatible operating systems Comparison of netbook-oriented Linux distributions
Comparison of operating systems
Comparison_of_operating_systems
Computer intended for use by an individual person
software–hardware platform stack (a Microsoft operating system, initially MS-DOS and later Windows, on a CPU based on Intel's x86 architecture) came to dominate
Personal_computer
Mid-1960s–late-1980s class of smaller computers
operating systems such as CP/M or MS-DOS, while minis were much more powerful systems that ran full multi-user, multitasking operating systems, such as VMS
Minicomputer
competed with OS/2 in terms of networking, multiuser support, multitasking, and MS-DOS compatibility. A few years after the first UniForum "ties were
History_of_Unix
Series of microcomputers produced by R2E
Bull. Starting with the Bull Micral 30, which could use both Prologue and MS-DOS, Groupe Bull transformed the Micral computers into a line of PC compatibles
Micral
Home computer and electronics manufacturer
pace against competing IBM PC-compatibles and Apple Macintosh. By 1992, MS-DOS and 16-bit video game consoles offered by Nintendo and Sega had eroded Amiga's
Commodore_International
1986 personal computer
the price increase, warning that it "opens the door further to low-cost MS-DOS computers". Some software companies complained that Apple did not provide
Apple_IIGS
Personal computer
solutions in certain cases), and the use of cooperative multitasking as opposed to preemptive multitasking to allow multiple applications to run at the same
Acorn_Archimedes
Alpert and D. Avnon, IEEE Micro, 13, #3 (June 1993), pp. 11–21, doi:10.1109/40.216745. p. 90, "Inside Intel", Business Week, #3268, June 1, 1992. Adleman
Timeline of computing 1990–1999
Timeline_of_computing_1990–1999
Family of personal computers released by Apple Computer
typically a 486 or Pentium; these models are therefore capable of running MS-DOS and Microsoft Windows applications, typically Windows 3.1 (for earlier PC
Power_Macintosh
Family of personal computers sold by Commodore
system, providing pre-emptive multitasking with prioritised round-robin scheduling. It enabled true pre-emptive multitasking in as little as 256 KB of free
Amiga
over $7,000 depending on which features were included. In comparison, an MS-DOS-running portable could weigh less than 10 pounds (4.5 kg) and cost under
List of commercial failures in computing
List_of_commercial_failures_in_computing
List of x86 microprocessor instructions
m64 forms of FILD and FISTP in a loop. This method has been used in some MS-DOS games such as Carmageddon and Pete Sampras Tennis '97. A recurring problem
List_of_x86_instructions
Family of computer operating systems
Unix (/ˈjuːnɪks/ , YOO-niks; trademarked as UNIX) is a family of multitasking, multi-user computer operating systems that derive from the original AT&T
Unix
Video gaming format
Limited Run Games to re-release The Eye of Typhoon for the 3DO (alongside the MS-DOS version being emulated by DOSBox) in 2022. 1990s portal 3DO Rating System
3DO
Minicomputer manufacturer, 1968–1999
as alternatives often were called, it was a nine-pound battery-powered MS-DOS machine equipped with dual 31⁄2-inch diskettes, a 79-key full-stroke keyboard
Data_General
Home computer by Texas Instruments
to discontinue the 99/4A, while continuing to sell the TI Professional MS-DOS-compatible computer. (TI stock rose by 25% after the announcement, because
TI-99/4A
Free Unix-like operating system kernel
systems like JFS, XFS, Minix, Xenix, Irix, Solaris, System V, Windows, and MS-DOS. Though development had not used a version control system thus far, in 2002
Linux_kernel
Core of a computer operating system
Mach kernel. Microsoft Windows was first released in 1985 as an add-on to MS-DOS. Because of its dependence on another operating system, initial releases
Kernel_(operating_system)
8-bit microprocessor
CP/M-80 applications running on the Z80, or a custom MS-DOS that was not fully compatible with PC DOS applications running on the 8088. In 1981, Multitech
Zilog_Z80
Chart used in plotting tropical cyclone tracks
to make a forecast by 25% or 1 hour. ATCF was originally developed for MS-DOS, before being adapted to Unix and Linux. Despite ATCF's introduction, into
Tropical cyclone tracking chart
Tropical_cyclone_tracking_chart
Science of forecasting how a tropical cyclone moves and its effects
to make a forecast by 25% or 1 hour. ATCF was originally developed for MS-DOS, before being adapted to Unix and Linux. The main storm surge forecast model
Tropical_cyclone_forecasting
Verrill, 1901 y Elysia patina Marcus, 1980, (Mollusca: Sacoglossa: Elysiidae) dos nombres para cuatro especies" (PDF). Vieraea (in Spanish). 33: 495–514. hdl:10902/4275
List of organisms named after famous people (born 1950–1974)
List_of_organisms_named_after_famous_people_(born_1950–1974)
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MS DOS-40-MULTITASKING
MS DOS-40-MULTITASKING
Male
Hungarian
Hungarian form of Greek Ioannes, JÃNOS means "God is gracious."
Female
English
Pet form of English Dorothy, DOT means "gift of God."
Male
Greek
(ΕÏÏίκος) Greek name which ultimately derives from Old German Amaliricus, ERRÃKOS means "work-power."
Surname or Lastname
English and Scottish
English and Scottish : nickname for a mild and gentle man, from Middle English do ‘doe’ (Old English dÄ).English (of Norman origin) : habitational name (Old French d’Eu) for someone from Eu in Seine-Maritime, France. The place name is either a dramatic reduction of Latin Augusta ‘(city of) Augustus’, or else derives from the Germanic element auwa ‘water meadow’, ‘island’.
Surname or Lastname
English
English : patronymic form of Dodd.
Male
English
Short form of English Dominic, DOM means "belongs to the lord."
Male
Hungarian
Hungarian form of Greek Theodoros, TÓDOR means "gift of God."
Male
English
Short form of English Donald, DON means "world ruler."
Male
Greek
(ἸάϊÏος) Greek form of Hebrew Yaiyr, IAÃROS means "whom God enlightens." In the bible, this is the name of several characters, including a descendant of Manasseh.Â
Boy/Male
American, Australian, British, English
Short Form of Name Starting with Des
Male
Hungarian
Hungarian name ÃKOS means "white falcon."
Surname or Lastname
English
English : see Fosse.Dutch (de Vos) : nickname for someone with red hair, from vos ‘fox’.North German : variant of Voss.
Male
English
Medieval pet form of English Robert, DOB means "bright fame."
Female
English
 Short form of English Rosalind, ROS means "weak horse." Compare with another form of Ros.
Male
Russian
(Фёдор) Variant form of Russian Fyodor, FÉDOR means "gift of God."
Female
Greek
(Ἠώς) Greek name EOS means "dawn." In mythology, this is the name of the goddess of dawn. Equated with Latin Aurora.
Surname or Lastname
Scottish (also found in Ireland)
Scottish (also found in Ireland) : reduced form of McDow. This surname is borne by a sept of the Buchanans.English : variant of Daw.Americanized spelling of Dutch Douw, an Old Frisian personal name.Americanized spelling of German Dau.Henry Dow (1634–1707), NH soldier and statesman, was born at Ormsby in Norfolkshire, England. His father migrated with his family to Watertown in the colony of Massachusetts Bay in 1637 and moved to Hampton in the province of NH in 1644. Henry became an influential and prosperous figure in Hampton. He married twice and had four sons.
Female
German
 Short form of German Rosamund, ROS means "horse-protection." Compare with another form of Ros.
Female
Hebrew
(דּï‹×¨) Variant spelling of Hebrew unisex Dowr, DOR means "generation" or "period of time." In the bible, this is the name of a coastal city in Manasseh, south of Carmel.
Male
Hebrew
(דּï‹×‘) Hebrew name DOV means "bear."
MS DOS-40-MULTITASKING
MS DOS-40-MULTITASKING
MS DOS-40-MULTITASKING
MS DOS-40-MULTITASKING
MS DOS-40-MULTITASKING
MS DOS-40-MULTITASKING
MS DOS-40-MULTITASKING
v. t. / auxiliary
To put or bring into a form, state, or condition, especially in the phrases, to do death, to put to death; to slay; to do away (often do away with), to put away; to remove; to do on, to put on; to don; to do off, to take off, as dress; to doff; to do into, to put into the form of; to translate or transform into, as a text.
2d pers. sing. pres.
of Do.
n.
The dog-rose.
n.
A fellow; -- used humorously or contemptuously; as, a sly dog; a lazy dog.
v. t.
To mark with dots or small spots; as, to dot a line.
n.
Pepsin modified by exposure to a temperature of from 40¡ to 60¡ C.
n.
One of the two constellations, Canis Major and Canis Minor, or the Greater Dog and the Lesser Dog. Canis Major contains the Dog Star (Sirius).
n.
Anything small and like a speck comparatively; a small portion or specimen; as, a dot of a child.
n.
A title anciently given to the pope, and later to other church dignitaries and some monastic orders. See Don, and Dan.
n.
A feat. [Obs.] See Do, n.
v. i.
To make dots or specks.
n.
A quadruped of the genus Canis, esp. the domestic dog (C. familiaris).
v. t.
To hunt or track like a hound; to follow insidiously or indefatigably; to chase with a dog or dogs; to worry, as if by dogs; to hound with importunity.
n.
A symbol expressing forty units; as, 40, or xl.
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